Patent EP0201243A2 successfully refreshed from Google Patents.
EP0201243A2
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EP
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Control system for an engine driven AC generator
Assignee: Honda Motor Co Ltd
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Filing: 1986-04-24
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Granted: —
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Expires: 2006-04-24
Abstract
Abstract A logic circuit determines whether the generator output should be at a high or low level in dependence on electrical load signals S1, S2 and a switching arrangement Tr produces one of two reference levels VS. Comparator CMP compares the battery voltage VB with reference voltage VS and issues a signal to controller CNT indicating whether the generator field current FC should be at a high or low level to charge the battery to the desired level. To avoid sudden excessive loads on the engine the controller compares a present ON time of the high field current with a previous time value and when the difference exceeds a predetermined amount temporarily forces the field current to the OFF level.
Inventors
- 👤 Genzo Hosono
- 👤 Masahiko Asakura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 17:30
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/1446; H02J7/16; H02J7/24; H02J7/2434; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/92
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
100 words
A control system for an engine driven generator wherein the generator is connected to a battery, and the system has control means for providing on and off signals to the generator in response to a comparator which compares the battery voltage with a reference voltage for developing on and off times for the generator, and the control means including a controller for detecting the present on time, means for determining whether the present on time equals or exceeds a control period, and means for forcibly switching the control means to temporarily provide an off signal to develop an off period.
Claim 2
Dependent Claim
100 words
A control system for an engine driven generator wherein the generator is connected to a battery, and the system has control means for providing on and off signals to the generator in response to a comparator which compares the battery voltage with a reference voltage for developing on and off times for the generator, and the control means including a controller for detecting the present on time, means for determining whether the present on time equals or exceeds a control period, and means for forcibly switching the control means to temporarily provide an off signal to develop an off period.
Claim 3
Dependent Claim
23 words
A system as in Claim 1 wherein said control period comprises the combined periods of a previous on time and a predetermined time.
Claim 4
Dependent Claim
14 words
A system as in Claim 2 wherein said predetermined time is a variable time.
Claim 5
Dependent Claim
14 words
A system as in Claim 1 wherein said control period is a predetermined time.
Claim 6
Independent Claim
24 words
A system as in any preceding claim wherein the forcibly switching of the control means provides an off signal of a predetermined time period.
Claim 7
Independent Claim
19 words
A system as in any preceding claim wherein the control period and the off period are both constant periods.
Claim 8
Independent Claim
21 words
A system as in any preceding claim wherein the control period is prolonged as a function of the present on time.
Claim 9
Independent Claim
21 words
A system as in any preceding claim wherein the off period is shortened as a function of the present on time.
Claim 10
Independent Claim
28 words
A system as in any preceding claim wherein the control period is adapted to be varied as a function of the variations in the voltage of the battery.
Claim 11
Independent Claim
24 words
A system as in any preceding claim wherein the off period is adapted to be varied with variations in the voltage of the battery.
Claim 12
Independent Claim
29 words
A system as in any preceding claim wherein both the control period and the off period are adapted to be varied with variations in the voltage of the battery.
Claim 13
Independent Claim
25 words
A system as in any preceding claim wherein the off period is adapted to be varied as a function of the number of off periods.
Claim 14
Independent Claim
20 words
A system as in any preceding claim wherein the control period is variable as a function of the reference voltage.
Claim 15
Dependent Claim
22 words
A system as in Claim 13 wherein the control period is shortened when the reference voltage is set at a high level.
Claim 16
Dependent Claim
26 words
A system as in Claim 13 wherein the control period is shortened when the reference voltage is switched from a low voltage to a high voltage.
Claim 17
Independent Claim
24 words
A system as in any preceding claim wherein the forcibly switching of the control means can be terminated as a function of engine torque.
Claim 18
Independent Claim
18 words
A system as in any preceding claim wherein the control means comprises a field coil of the generator.
Claim 19
Dependent Claim
122 words
A control system for an engine driven AC generator connected in parallel to a battery, wherein a field winding of the generator is controlled in on and off states in response to an output signal of a comparator which compares the battery voltage with a reference vottage and under control of a controller so that the battery voltage is caused to change to the reference voltage, characterized in that the controller includes means for measuring and holding the on time of the field winding, means for detecting that the present on time becomes longer than the previous on time by a prescribed time, and means for forcibly switching the generating power of the generator to the off state temporarily in response thereto.
Claim 20
Dependent Claim
122 words
A control system for an engine driven AC generator connected in parallel to a battery, wherein a field winding of the generator is controlled in on and off states in response to an output signal of a comparator which compares the battery voltage with a reference vottage and under control of a controller so that the battery voltage is caused to change to the reference voltage, characterized in that the controller includes means for measuring and holding the on time of the field winding, means for detecting that the present on time becomes longer than the previous on time by a prescribed time, and means for forcibly switching the generating power of the generator to the off state temporarily in response thereto.
Claim 21
Dependent Claim
30 words
A control system as in Claim 18 wherein the prescribed time is variably set corresponding to the previous prescribed time and/or the number of forcible changes to the off state.
Claim 22
Dependent Claim
48 words
A control system as in Claim 18 or 19 wherein the time of forcibly changing the generating power of the generator to the off state is variably set corresponding to the previous changing time to the on state and/or the number of forcible changes to the off state.
Claim 23
Dependent Claim
50 words
A control system as in Claim 18, 19 or 20 including means for detecting that an output torque of the engine is in a high operating condition, and means for releasing the forcible switching of said field current of said generator upon detection of said output torque of said engine.
Claim 24
Dependent Claim
125 words
A control system for an engine driven AC generator connected in parallel with a battery wherein the field coil current for the generator is turned on and off by a controller in response to an output signal of a comparator which compares the battery voltage with a predetermined reference voltage in order that the battery voltage is caused to be brought to the level of the reference voltage, said control system for the generator comprising, means for detecting that an on state of the field coil current for the generator has continued for a predetermined first period of time, and means for forcibly switching the field coil current to the off state for a predetermined second period of time when the above detection is made.
Claim 25
Dependent Claim
125 words
A control system for an engine driven AC generator connected in parallel with a battery wherein the field coil current for the generator is turned on and off by a controller in response to an output signal of a comparator which compares the battery voltage with a predetermined reference voltage in order that the battery voltage is caused to be brought to the level of the reference voltage, said control system for the generator comprising, means for detecting that an on state of the field coil current for the generator has continued for a predetermined first period of time, and means for forcibly switching the field coil current to the off state for a predetermined second period of time when the above detection is made.
Claim 26
Dependent Claim
21 words
A control system as in Claim 22 wherein said first period and said second period are each adapted to be constant.
Claim 27
Dependent Claim
45 words
A control system as in Claim 22 wherein said first period is adapted to be prolonged with the lapse of time so long as the output from the comparator remains in a condition to cause the field coil current to be in the on state.
Claim 28
Dependent Claim
42 words
A control system as in Claim 22 or 24 wherein said second period is adapted to be shortened as long as the output from the comparator remains in a condition to cause the field coil current to be in the on state.
Claim 29
Dependent Claim
29 words
A control system as in Claim 22 wherein said first period and said second period are adapted to be varied with the variations in the voltage of the battery.
Claim 30
Dependent Claim
36 words
A control system as in Claim 22 wherein said second period is adapted to be varied in accordance with the number of times the field coil current for the generator is switched to the off state.
Claim 31
Dependent Claim
193 words
A control system for an engine driven AC generator connected in parallel with a battery wherein the field coil current for the generator is controlled to be switched on and off by a controller in response to an output signal of a comparator for comparing the battery voltage with a predetermined reference voltage in order that the battery voltage is caused to be brought to the level of the reference voltage, said control system for the engine driven generator comprising, means for switching the reference voltage on the comparator between a high voltage level and a low voltage level so that the reference voltage is set at the high voltage level or the low voltage level according to electrical load conditions and engine operating conditions, means for detecting that an on state of the field coil current for the generator has continued for a predetermined first period of time, means for forcibly switching the field coil current to the off state for a predetermined second period of time when the above detection is made, and means for varying said first period according to the high or low level state of the reference voltage.
Claim 32
Dependent Claim
193 words
A control system for an engine driven AC generator connected in parallel with a battery wherein the field coil current for the generator is controlled to be switched on and off by a controller in response to an output signal of a comparator for comparing the battery voltage with a predetermined reference voltage in order that the battery voltage is caused to be brought to the level of the reference voltage, said control system for the engine driven generator comprising, means for switching the reference voltage on the comparator between a high voltage level and a low voltage level so that the reference voltage is set at the high voltage level or the low voltage level according to electrical load conditions and engine operating conditions, means for detecting that an on state of the field coil current for the generator has continued for a predetermined first period of time, means for forcibly switching the field coil current to the off state for a predetermined second period of time when the above detection is made, and means for varying said first period according to the high or low level state of the reference voltage.
Claim 33
Dependent Claim
27 words
A control system as in Claim 28 wherein the first period is adapted to be shortened when the reference voltage is set at the high voltage level.
Claim 34
Dependent Claim
32 words
A control system as in Claim 28 wherein the first period is adapted to be shortened when the reference voltage is switched from the low voltage level to the high voltage level.
References Cited (Backward Citations)
No citation records indexed.
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