Electric vehicle control analyzer
First Claim
1. Test apparatus adapted for connection to an electric vehicle propulsion control system of the type wherein a power control system comprising plural types of electrical components supplies regulated electric power from a traction battery to electric traction motor means, and a logic circuit is normally connected to control the operation of the power control system, said test apparatus being adapted for connection to said propulsion control system in lieu of said logic circuit for testing individual components of said power control system in situs, and comprising:
- a. a plurality of output terminals adapted for simultaneous connection to said propulsion control system;
b. plural switching means adapted to be selectively actuated, in accordance to the individual one of said components to be tested;
c. a plurality of indicating means adapted to provide a discrete indication of performance of components being tested;
d. a plurality of voltage comparators, each comprising first and second inputs and an output coupled to at least one of said indicating means;
e. a first group of said output terminals being adapted for connection in circuit with said traction battery and with predetermined ones of the components of said propulsion control circuit; and
f. connection means connecting said first group of output terminals, in circuit with predetermined ones of said switching means and the inputs of said voltage comparators such that upon actuation of selected ones of said predetermined ones of said switching means a first signal produced by application of the traction battery to a circuit comprising the component under test is applied to a first input of one of said comparators and a second signal representative of the voltage of said traction battery is applied to a second input of said comparator whereby said indicating means provides a discrete indication of component performance irrespective of voltage variations of said traction battery within a predetermined range.
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Accused Products
Abstract
An analyzer for an electrical vehicle control system which includes a self-contained power source to allow excitation and evaluation of individual components in the control system. The analyzer plugs into the control system and includes a plurality of switches for selectively connecting various output terminals of the analyzer to internal logic circuits for monitoring the operation of selected components of the control system on an individual basis.
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Citations
11 Claims
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1. Test apparatus adapted for connection to an electric vehicle propulsion control system of the type wherein a power control system comprising plural types of electrical components supplies regulated electric power from a traction battery to electric traction motor means, and a logic circuit is normally connected to control the operation of the power control system, said test apparatus being adapted for connection to said propulsion control system in lieu of said logic circuit for testing individual components of said power control system in situs, and comprising:
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a. a plurality of output terminals adapted for simultaneous connection to said propulsion control system; b. plural switching means adapted to be selectively actuated, in accordance to the individual one of said components to be tested; c. a plurality of indicating means adapted to provide a discrete indication of performance of components being tested; d. a plurality of voltage comparators, each comprising first and second inputs and an output coupled to at least one of said indicating means; e. a first group of said output terminals being adapted for connection in circuit with said traction battery and with predetermined ones of the components of said propulsion control circuit; and f. connection means connecting said first group of output terminals, in circuit with predetermined ones of said switching means and the inputs of said voltage comparators such that upon actuation of selected ones of said predetermined ones of said switching means a first signal produced by application of the traction battery to a circuit comprising the component under test is applied to a first input of one of said comparators and a second signal representative of the voltage of said traction battery is applied to a second input of said comparator whereby said indicating means provides a discrete indication of component performance irrespective of voltage variations of said traction battery within a predetermined range. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A circuit arrangement for testing an electric vehicle control unit, said control unit including a source of direct current power, a power switch for supplying voltage to an electric motor, a commutating capacitor, a commutating switch arranged to connect said capacitor in parallel to said power switch and a plurality of control inputs, said circuit arrangement comprising:
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a first manually operated switching means a first indicating means; a first logic circuit connected to control said first indicating means said first switching means being connected in circuit with said source of direct current power and said commutating capacitor such that said commutating capacitor is discharged upon closure of said frist switching means and is recharged upon opening of said first switching means;
said first logic circuit being connected to excite said first indicating means when said first switching means is closed and maintain said indicating means excited after said first switching means is opened and until said capacitor charges to a predetermined level. - View Dependent Claims (8, 9, 10)
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11. Test apparatus adapted for connection to an electric vehicle propulsion control system of the type wherein a power control system supplies regulated electric power from a traction battery to electric traction motor means, said power control system comprising a plurality of controlled static rectifiers for power switching and commutating each comprising anode, cathode, and gate electrodes, said test apparatus being adapted for connection to said propulsion control system in lieu of said logic circuit for testing individual components of said power control system in situs, and comprising:
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a. plurality of output terminals adapted for connection to the electrodes of the controlled static devices in said propulsion control system; b. plural switching means adapted to be selectively actuated in accordance to the individual one of said components to be tested; c. indicating means adapted to provide a discrete indication of performance of components being tested; d. a source of D-C potential; e. diode means; f. additional switching means; g. means for connecting said output terminals in circuit with said source of D-C potential, said switching means and said indicating means to provide a series circuit comprising said D-C source, said indicating means, and the anode and cathode of a selected one of said controlled static rectifiers; and h. means for connecting said output terminals in circuit with said source of D-C potential, said diode means, and said additional switching means whereby actuation of said additional switching means applies to the gate electrode of said selected one of the controlled static rectifiers a gating voltage having a potential intermediate the anode and cathode potentials to provide turn on of the selected one of the controlled static rectifiers.
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Specification