Method for controlling a vehicle provided with an electric power converter
First Claim
1. A method for controlling a vehicle provided with an electric power converter converting DC electric power supplied from a DC electric power source through a pantograph into AC electric power, a plurality of induction motors driving wheels using said converted AC electric power, a filter reactor disposed between said pantograph and said electric power converter, and a filter condenser disposed at an output side of said filter reactor, the method comprising the steps of:
- providing in said vehicle an electric power semiconductor switching element and a resistor connected in series each other and connected in parallel with said filter condenser; and
applying to said electric power semiconductor switching element a control signal canceling an AC component superimposed on DC current supplied to said electric power converter by a current flowing in said electric power semiconductor switching element.
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Abstract
The voltage applied to a power converter is detected by a voltage detector, a function generator produces a voltage proportional to this detected voltage, and a high-pass filter detects an AC component superimposed on the voltage. An adder adds a bias voltage to this AC component, and an adder adds the output from the adder and the output from the function generator. The output from the adder is compared with a triangular wave produced from a rectangular wave generator, and a switching element is controlled to make switching operation according to the compared result. When a DC current is decreased by the AC component, a resistance current Ib is increased so that the AC components superimposed on the current and resistance current can be cancelled out.
23 Citations
5 Claims
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1. A method for controlling a vehicle provided with an electric power converter converting DC electric power supplied from a DC electric power source through a pantograph into AC electric power, a plurality of induction motors driving wheels using said converted AC electric power, a filter reactor disposed between said pantograph and said electric power converter, and a filter condenser disposed at an output side of said filter reactor, the method comprising the steps of:
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providing in said vehicle an electric power semiconductor switching element and a resistor connected in series each other and connected in parallel with said filter condenser; and
applying to said electric power semiconductor switching element a control signal canceling an AC component superimposed on DC current supplied to said electric power converter by a current flowing in said electric power semiconductor switching element. - View Dependent Claims (2, 3, 4, 5)
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Specification