Control apparatus of electric motor cars

• US 4,119,862 A
• Filed: 09/29/1975
• Issued: 10/10/1978
• Est. Priority Date: 09/30/1974
• Status: Expired due to Term

• Current Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
• Original Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
• Inventors: Gocho, Choichi
• Primary Examiner(s): Schaefer, Robert K.
• Assistant Examiner(s): Feeney, William L.
• Application Number:
  US05/617,376
• Time in Patent Office: 1,107 Days
• Field of Search: 290/8, 290/9, 290/10, 290/14, 290/15, 290/16, 290/17, 290/41, 290/50, 318/139, 322/25, 322/29, 322/36, 180/65 C, 180/65 B
• US Class Current: 290/17
• CPC Class Codes: B60K 6/46 Series type
• CPC Class Codes: B60L 50/13 using AC generators and AC motors
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y10S 903/903 having energy storing means, e.g. battery, capacitor

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.

Claims

1. 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.

2. 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.

3. 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.