Patent US4119862A successfully refreshed from Google Patents.
US4119862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus of electric motor cars
Assignee: Toshiba Corp
•
Filing: 1975-09-29
•
Granted: 1978-10-10
•
Expires: 1995-09-29
Abstract
Abstract An electric motor car wherein an electric motor for driving the car is energized by a fuel engine driven generator and a battery is connected in parallel with the motor to be float charged by the generator. Control apparatus is provided for always maintaining the output of the generator at a constant value irrespective of variations in the load and for supplying the varying component of the load from the battery.
Inventors
- 👤 Choichi Gocho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:11
CPC Classifications
B; B60; B60K; B60K6/00; B60K6/20; B60K6/42; B60K6/46; B60L; B60L50/00; B60L50/10; B60L50/13; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y02T10/70; Y02T10/7072; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
292 words
A control apparatus for an electric motor car wherein a generator is driven by a fuel engine, the driving motor of the car is energized by said generator, and a battery is connected in parallel with said motor to be float-charged by said generator, said control apparatus comprising means for detecting the electric output power of said generator including a first detector for detecting the voltage of said generator, a second detector for detecting the current of said generator, and a multiplier for multiplying the output of said first detector and the output of said second detector thereby producing a signal proportional to the output power of said generator; means including a first variable resistor which is set in accordance with the running condition of said car for producing an output which varies as a variable function of the output from said generator output power detecting means; means for producing a reference signal; means for comparing said variable output with said reference signal for adjusting the field current of said generator thereby maintaining the output of said generator at a substantially constant value irrespective of the running condition of said car; an amplifier; a second variable resistor for applying the output of said first detector to said amplifier for setting a voltage limit of said generator; a third variable resistor for applying the output of said second detector to said amplifier for setting a current limit of said generator; means for applying the output from said amplifier to said comparing means for comparing with said reference signal; and means connected in the circuit of the field winding of said generator to apply a feedback signal proportional to the field current to said amplifier thereby limiting the field current to a predetermined value.
Claim 2
Dependent Claim
292 words
A control apparatus for an electric motor car wherein a generator is driven by a fuel engine, the driving motor of the car is energized by said generator, and a battery is connected in parallel with said motor to be float-charged by said generator, said control apparatus comprising means for detecting the electric output power of said generator including a first detector for detecting the voltage of said generator, a second detector for detecting the current of said generator, and a multiplier for multiplying the output of said first detector and the output of said second detector thereby producing a signal proportional to the output power of said generator; means including a first variable resistor which is set in accordance with the running condition of said car for producing an output which varies as a variable function of the output from said generator output power detecting means; means for producing a reference signal; means for comparing said variable output with said reference signal for adjusting the field current of said generator thereby maintaining the output of said generator at a substantially constant value irrespective of the running condition of said car; an amplifier; a second variable resistor for applying the output of said first detector to said amplifier for setting a voltage limit of said generator; a third variable resistor for applying the output of said second detector to said amplifier for setting a current limit of said generator; means for applying the output from said amplifier to said comparing means for comparing with said reference signal; and means connected in the circuit of the field winding of said generator to apply a feedback signal proportional to the field current to said amplifier thereby limiting the field current to a predetermined value.
Claim 3
Dependent Claim
262 words
A control apparatus for an electric motor car wherein an alternator is driven by a fuel engine, and alternating current motor for driving said car is energized by said alternator through a series connected rectifier and inverter, and a battery is connected in parallel with said inverter for float charging, said control apparatus comprising a potential transformer for detecting the voltage of said alternator; a current transformer for detecting the current of said alternator; a multiplier for multiplying the output of said potential transformer with the output of said current transformer thereby producing a signal proportional to the output power of said alternator, a first amplifier connected to amplify said signal; means including a first variable resistor which is set in accordance with the running condition of said car for varying the gain of said first amplifier; a second amplifier; a second variable resistor for applying the output from said potential transformer to said second amplifier for setting the voltage limit of said alternator; a third variable resistor for applying the output of said current transformer to said second amplifier for setting the current limit of said alternator; a reference signal source; a comparator for comparing the outputs of said first and second amplifiers with said reference signal; means responsive to the output from said comparator for controlling the field current of said alternator; a starting inverter connected between said alternator and said battery; and means responsive to the residual capacity of said battery for operating said starting inverter, thereby causing said alternator to operate as a motor for starting said engine.
Claim 4
Dependent Claim
262 words
A control apparatus for an electric motor car wherein an alternator is driven by a fuel engine, and alternating current motor for driving said car is energized by said alternator through a series connected rectifier and inverter, and a battery is connected in parallel with said inverter for float charging, said control apparatus comprising a potential transformer for detecting the voltage of said alternator; a current transformer for detecting the current of said alternator; a multiplier for multiplying the output of said potential transformer with the output of said current transformer thereby producing a signal proportional to the output power of said alternator, a first amplifier connected to amplify said signal; means including a first variable resistor which is set in accordance with the running condition of said car for varying the gain of said first amplifier; a second amplifier; a second variable resistor for applying the output from said potential transformer to said second amplifier for setting the voltage limit of said alternator; a third variable resistor for applying the output of said current transformer to said second amplifier for setting the current limit of said alternator; a reference signal source; a comparator for comparing the outputs of said first and second amplifiers with said reference signal; means responsive to the output from said comparator for controlling the field current of said alternator; a starting inverter connected between said alternator and said battery; and means responsive to the residual capacity of said battery for operating said starting inverter, thereby causing said alternator to operate as a motor for starting said engine.
Claim 5
Dependent Claim
260 words
A control apparatus for an electric motor car wherein an alternator is driven by a fuel engine, an alternating current motor for driving said car is energized by said alternator through a series connected rectifier and inverter, and a battery is connected in parallel with said inverter for float charging, said control apparatus comprising a potential transformer for detecting the voltage of said alternator; a current transformer for detecting the current of said alternator; a multiplier for multiplying the output of said potential transformer with the output of said current transformer thereby producing a signal proportional to the output power of said alternator; a first amplifier connected to amplify said signal; means including a first variable resistor which is set in accordance with the running condition of said car for varying the gain of said first amplifier; a second amplifier; a second variable resistor for applying the output from said potential transformer to said second amplifier for setting the voltage limit of said alternator; a third variable resistor for applying the output of said current transformer to said second amplifier for setting the current limit of said alternator; a reference signal source; a comparator for comparing the outputs of said first and second amplifiers with said reference signal; means responsive to the output from said comparator for controlling the field current of said alternator; and a shunt connected in series with the field winding of said alternator for applying a feedback signal proportional to the field current to said second amplifier thereby limiting the field current to a predetermined value.
Claim 6
Dependent Claim
260 words
A control apparatus for an electric motor car wherein an alternator is driven by a fuel engine, an alternating current motor for driving said car is energized by said alternator through a series connected rectifier and inverter, and a battery is connected in parallel with said inverter for float charging, said control apparatus comprising a potential transformer for detecting the voltage of said alternator; a current transformer for detecting the current of said alternator; a multiplier for multiplying the output of said potential transformer with the output of said current transformer thereby producing a signal proportional to the output power of said alternator; a first amplifier connected to amplify said signal; means including a first variable resistor which is set in accordance with the running condition of said car for varying the gain of said first amplifier; a second amplifier; a second variable resistor for applying the output from said potential transformer to said second amplifier for setting the voltage limit of said alternator; a third variable resistor for applying the output of said current transformer to said second amplifier for setting the current limit of said alternator; a reference signal source; a comparator for comparing the outputs of said first and second amplifiers with said reference signal; means responsive to the output from said comparator for controlling the field current of said alternator; and a shunt connected in series with the field winding of said alternator for applying a feedback signal proportional to the field current to said second amplifier thereby limiting the field current to a predetermined value.
References Cited (Backward Citations)
US3374419A
Cited
US3487291A
Cited
US3503464A
Cited
US3525924A
Cited
US3605006A
Cited
US3621370A
Cited
US3713504A
Cited
US3792327A
Cited
US3878400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |