Controlling/driving apparatus for an electrically-driven compressor in a car

Claim 2

A compressor drive control apparatus for an electrically-driven compressor for a car, said apparatus comprising: an electrically-driven compressor including an electric motor; DC-AC conversion means including a group of switching elements which receive and convert a DC voltage to a pseudo AC voltage which is formed of a train of positive and negative voltage pulses, said pseudo AC voltage for driving said motor; DC voltage detection means for detecting said DC voltage; and control means for generating and applying pulse-width modulation signals to said switching elements to generate said train of voltage pulses, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for (1) storing programmed data, (2) reading at least a portion of said fundamental pulse-width data from said memory, and (3) changing the read-out fundamental pulse-width data in response to the DC voltage detected by said detection means so as to generate said pulse-width modulation signals.

Claim 3

An apparatus according to claim 1, wherein said control means includes a microcomputer.

Claim 4

An apparatus according to claim 2, wherein said electric motor is disposed within a cavity of said compressor.

Claim 5

An apparatus according to claim 1, wherein said electric motor is disposed within a cavity of said compressor.

Claim 6

An apparatus according to claim 1, wherein said pulse-width changing means includes means for (i) determining a first proportion of the DC voltage detected by said detection means to a preset DC voltage, and (ii) changing the pulse width of said pseudo AC voltage in response to said first proportion.

Claim 7

An apparatus according to claim 5, wherein said electric motor is disposed within a cavity of said compressor.

Claim 8

An apparatus according to claim 1, wherein said pulse-width changing means includes means for (i) determining a second proportion of a value of the pseudo AC voltage determined based upon a number or frequency of compressor revolutions with respect to a preset value of the pseudo AC voltage, and (ii) changing the pulse width of the pseudo AC voltage in response to said second proportion.

Claim 9

An apparatus according to claim 7, wherein said electric motor is disposed within a cavity of said compressor.

Claim 10

An apparatus according to claim 1, wherein said pulse-width changing means includes means for (i) determining a first proportion of the DC voltage detected by said detection means to a preset DC voltage, a second proportion of a value of the pseudo AC voltage determined based upon a number or frequency of compressor revolutions with respect to a preset value of the pseudo AC voltage, and a third proportion equal to a product of said first and second proportions, and (ii) changing the pulse width of said pseudo AC voltage in response to any one of said first to third proportions.

Claim 11

An apparatus according to claim 9, wherein said electric motor is disposed within a cavity of said compressor.

Claim 12

An apparatus according to claim 1, wherein said memory for storing data of fundamental pulse widths operates to generate predetermined fundamental pseudo AC voltage pulses.

Claim 13

An apparatus according to claim 11, wherein said electric motor is disposed within a cavity of said compressor.

Claim 14

An apparatus according to claim 1, wherein said memory is a read-only memory.

Claim 15

An apparatus according to claim 13, wherein said electric motor is disposed within a cavity of said compressor.

Claim 16

An apparatus according to claim 1, wherein said pulse-width changing means changes the data or pulse width to keep constant an effective value of the pseudo AC voltage so as to avoid possible significant variations due to running speed variations of said car.

Claim 17

An apparatus according to claim 15, wherein said electric motor is disposed within a cavity of said compressor.

Claim 18

A compressor drive control apparatus for an electrically-driven compressor for an electric car, said apparatus comprising: an electrically-driven compressor including an electric motor; DC-AC conversion means including a group of switching elements which receive and convert a DC voltage, which is generated by a car battery which is mounted in said car and which provides power for driving the car, to a pseudo AC voltage which is formed of a train of positive and negative voltage pulses, said pseudo AC voltage for driving said motor; DC voltage detection means for detecting said DC voltage; and control means for generating and applying pulse-width modulation signals to said switching elements to generate said train of voltage pulses, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for (1) storing programmed data, (2) reading at least a portion of said fundamental pulse-width data from said memory, and (3) changing the read-out fundamental pulse-width data in response to the DC voltage detected by said detection means so as to generate said pulse-width modulation signals.

Claim 19

A compressor drive control apparatus for an electrically-driven compressor for an electric car, said apparatus comprising: an electrically-driven compressor including an electric motor; DC-AC conversion means including a group of switching elements which receive and convert a DC voltage, which is generated by a car battery which is mounted in said car and which provides power for driving the car, to a pseudo AC voltage which is formed of a train of positive and negative voltage pulses, said pseudo AC voltage for driving said motor; DC voltage detection means for detecting said DC voltage; and control means for generating and applying pulse-width modulation signals to said switching elements to generate said train of voltage pulses, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for (1) storing programmed data, (2) reading at least a portion of said fundamental pulse-width data from said memory, and (3) changing the read-out fundamental pulse-width data in response to the DC voltage detected by said detection means so as to generate said pulse-width modulation signals.

Claim 20

An apparatus according to claim 17, wherein said pulse-width changing means is adapted to change the data or pulse width to keep constant an effective value of the converted pseudo AC voltage without possible significant variations due to running speed variations of said electric car.

Claim 21

An apparatus according to claim 18, wherein said electric motor is disposed within a cavity of said compressor.

Claim 22

An apparatus according to claim 17, wherein said electric motor is disposed within a cavity of said compressor.

Claim 23

An apparatus according to claim 17, wherein said pulse-width changing means includes means for (i) determining a first proportion of the DC voltage detected by said detection means to a preset DC voltage, and (ii) changing the pulse width of said pseudo AC voltage in response to said first proportion.

Claim 24

An apparatus according to claim 21, wherein said electric motor is disposed within a cavity of said compressor.

Claim 25

An apparatus according to claim 17, wherein said pulse-width changing means includes means for (i) determining a second proportion of a value of the pseudo AC voltage determined based upon a number or frequency of compressor revolutions with respect to a preset value of the pseudo AC voltage, and (ii) changing the pulse width of the pseudo AC voltage in response to said second proportion.

Claim 26

An apparatus according to claim 23, wherein said memory is a read-only memory.

Claim 27

An apparatus according to claim 24, wherein said electric motor is disposed within a cavity of said compressor.

Claim 28

An apparatus according to claim 23, wherein said electric motor is disposed within a cavity of said compressor.

Claim 29

An apparatus according to claim 17, wherein said pulse-width changing means includes means for (i) determining a first proportion of the DC voltage detected by said detection means to a preset DC voltage, a second proportion of a value of the pseudo AC voltage determined based upon a number or frequency of compressor revolutions with respect to a preset value of the pseudo AC voltage, and a third proportion equal to a product of said first and second proportions, and (ii) changing the pulse width of said pseudo AC voltage in response to any one of said first to third proportions.

Claim 30

An apparatus according to claim 27, wherein said electric motor is disposed within a cavity of said compressor.

Claim 31

An apparatus according to claim 17, wherein said memory for storing data of fundamental pulse widths operates to generate predetermined fundamental pseudo AC voltage pulses.

Claim 32

An apparatus according to claim 29, wherein said electric motor is disposed within a cavity of said compressor.

Claim 33

An apparatus according to claim 17, wherein said control means includes a microcomputer.

Claim 34

An apparatus according to claim 31, wherein said electric motor is disposed within a cavity of said compressor.

Claim 35

A compressor drive control apparatus for an electrically-driven compressor for a car, comprising: means for generating a DC voltage; a hermetically-sealed type electrically-driven compressor including an electric motor and adapted to compress air conditioning coolant; DC-AC conversion means including a group of switching elements and adapted to receive and convert the generated DC voltage to a pseudo AC voltage, formed of a train of positive and negative pulses, for driving said motor; DC voltage detection means for detecting the DC voltage; and control means for a generating and applying pulse-width modulation signals to said switching elements to generate the converted train of the pulse voltages, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for storing programmed data for changing a pulse width of said pulse train in response to the DC voltage detected by said detection means.

Claim 36

A compressor drive control apparatus for an electrically-driven compressor for a car, comprising: means for generating a DC voltage; a hermetically-sealed type electrically-driven compressor including an electric motor and adapted to compress air conditioning coolant; DC-AC conversion means including a group of switching elements and adapted to receive and convert the generated DC voltage to a pseudo AC voltage, formed of a train of positive and negative pulses, for driving said motor; DC voltage detection means for detecting the DC voltage; and control means for a generating and applying pulse-width modulation signals to said switching elements to generate the converted train of the pulse voltages, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for storing programmed data for changing a pulse width of said pulse train in response to the DC voltage detected by said detection means.

Claim 37

An apparatus according to claim 33, wherein said pulse-width changing means is adapted to read a fundamental pulse width data from said memory and to change the read fundamental pulse width data in response to the DC voltage detected by said detection means.

Claim 38

An apparatus according to claim 34, wherein said electric motor is disposed within a cavity of said compressor.

Claim 39

An apparatus according to claim 33, wherein said pulse-width changing means includes means for (i) determining a first proportion of the DC voltage detected by said detection means to a preset DC voltage, and (ii) changing the pulse width of said pseudo AC voltage in response to said first proportion.

Claim 40

An apparatus according to claim 36, wherein said electric motor is disposed within a cavity of said compressor.

Claim 41

An apparatus according to claim 33, wherein said control means includes a microcomputer.

Claim 42

An apparatus according to claim 38, wherein said electric motor is disposed within a cavity of said compressor.

Claim 43

An apparatus according to claim 33, wherein said electric motor is disposed within a cavity of said compressor.

Claim 44

A compressor drive control apparatus for an electrically-driven compressor for an electric car, said apparatus comprising: a car battery mounted in said car as a power source for driving said car and generating a DC voltage; a hermetically-sealed type electrically-driven compressor including an electric motor and adapted to compress air conditioning coolant; DC-AC conversion means including a group of switching elements and adapted to receive and convert the generated DC voltage to a pseudo AC voltage, formed of a train of positive and negative pulses, for driving said motor; DC voltage detection means for detecting the DC voltage; and control means for a generating and applying pulse-width modulation signals to said switching elements to generate the converted train of the pulse voltages, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for (1) storing programmed data, and (2) changing a pulse width of said pulse train in response to the DC voltage detected by said detection means.

Claim 45

A compressor drive control apparatus for an electrically-driven compressor for an electric car, said apparatus comprising: a car battery mounted in said car as a power source for driving said car and generating a DC voltage; a hermetically-sealed type electrically-driven compressor including an electric motor and adapted to compress air conditioning coolant; DC-AC conversion means including a group of switching elements and adapted to receive and convert the generated DC voltage to a pseudo AC voltage, formed of a train of positive and negative pulses, for driving said motor; DC voltage detection means for detecting the DC voltage; and control means for a generating and applying pulse-width modulation signals to said switching elements to generate the converted train of the pulse voltages, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for (1) storing programmed data, and (2) changing a pulse width of said pulse train in response to the DC voltage detected by said detection means.

Claim 46

An apparatus according to claim 41, wherein said pulse-width changing means is adapted to change the data or pulse width to keep constant an effective value of the converted pseudo AC voltage without possible significant variations due to running speed variations of said electric car.

Claim 47

An apparatus according to claim 42, wherein said electric motor is disposed within a cavity of said compressor.

Claim 48

An apparatus according to claim 41, wherein said electric motor is disposed within a cavity of said compressor.

Claim 49

A compressor drive control apparatus for an electrically-driven compressor for a car, comprising: a hermetically-sealed type electrically-driven compressor including an electric motor, said compressor for compressing air conditioning coolant; DC-AC conversion means including a group of switching elements which receive and convert a DC voltage to a pseudo AC voltage which is formed of a train of positive and negative voltage pulses, said pseudo AC voltage for driving said motor; DC voltage detection means for detecting the DC voltage; and control means for generating and applying pulse-width modulation signals to said switching elements to generate said train of voltage pulses, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for storing programmed data for changing a pulse width of said train of voltage pulses in response to the DC voltage detected by said detection means; wherein said pulse-width changing means includes means for (i) determining a first proportion of the DC voltage detected by said detection means to a preset DC voltage, a second proportion of a value of the pseudo AC voltage determined based upon a number or frequency of compressor revolutions with respect to a preset value of the pseudo AC voltage, and a third proportion equal to a product of said first and second proportions, and (ii) changing the pulse width of said pseudo AC voltage in response to any one of said first to third proportions.

Claim 50

A compressor drive control apparatus for an electrically-driven compressor for a car, comprising: a hermetically-sealed type electrically-driven compressor including an electric motor, said compressor for compressing air conditioning coolant; DC-AC conversion means including a group of switching elements which receive and convert a DC voltage to a pseudo AC voltage which is formed of a train of positive and negative voltage pulses, said pseudo AC voltage for driving said motor; DC voltage detection means for detecting the DC voltage; and control means for generating and applying pulse-width modulation signals to said switching elements to generate said train of voltage pulses, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for storing programmed data for changing a pulse width of said train of voltage pulses in response to the DC voltage detected by said detection means; wherein said pulse-width changing means includes means for (i) determining a first proportion of the DC voltage detected by said detection means to a preset DC voltage, a second proportion of a value of the pseudo AC voltage determined based upon a number or frequency of compressor revolutions with respect to a preset value of the pseudo AC voltage, and a third proportion equal to a product of said first and second proportions, and (ii) changing the pulse width of said pseudo AC voltage in response to any one of said first to third proportions.

Claim 51

An apparatus according to claim 45, wherein said memory for storing data of fundamental pulse widths operates to generate predetermined fundamental pseudo AC voltage pulses.

Claim 52

An apparatus according to claim 46, wherein said memory is a read-only memory.

Claim 53

An apparatus according to claim 47, wherein said electric motor is disposed within a cavity of said compressor.

Claim 54

An apparatus according to claim 46, wherein said electric motor is disposed within a cavity of said compressor.

Claim 55

An apparatus according to claim 45, wherein said electric motor is disposed within a cavity of said compressor.

Claim 56

A compressor drive control apparatus for an electrically-driven compressor for a car, comprising: a hermetically-sealed type electrically-driven compressor including an electric motor, said compressor for compressing air conditioning coolant; DC-AC conversion means including a group of switching elements which receive and convert a DC voltage to a pseudo AC voltage which is formed of a train of positive and negative voltage pulses, said pseudo AC voltage for driving said motor; DC voltage detection means for detecting the DC voltage; and control means for generating and applying pulse-width modulation signals to said switching elements to generate said train of voltage pulses, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for storing programmed data for changing a pulse width of said train of voltage pulses in response to the DC voltage detected by said detection means; wherein said pulse-width changing means includes means for (i) determining a second proportion of a value of the pseudo AC voltage determined based upon a number or frequency of the compressor revolutions with respect to a preset value of the pseudo AC voltage, and (ii) changing the pulse width of the pseudo AC voltage in response to said second proportion.

Claim 57

A compressor drive control apparatus for an electrically-driven compressor for a car, comprising: a hermetically-sealed type electrically-driven compressor including an electric motor, said compressor for compressing air conditioning coolant; DC-AC conversion means including a group of switching elements which receive and convert a DC voltage to a pseudo AC voltage which is formed of a train of positive and negative voltage pulses, said pseudo AC voltage for driving said motor; DC voltage detection means for detecting the DC voltage; and control means for generating and applying pulse-width modulation signals to said switching elements to generate said train of voltage pulses, said control means including (i) a memory for storing fundamental pulse width data, and (ii) pulse-width changing means for storing programmed data for changing a pulse width of said train of voltage pulses in response to the DC voltage detected by said detection means; wherein said pulse-width changing means includes means for (i) determining a second proportion of a value of the pseudo AC voltage determined based upon a number or frequency of the compressor revolutions with respect to a preset value of the pseudo AC voltage, and (ii) changing the pulse width of the pseudo AC voltage in response to said second proportion.

Claim 58

An apparatus according to claim 51, wherein said electric motor is disposed within a cavity of said compressor.