Open delta motor drive with integrated recharge
First Claim
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1. An integrated motor drive and battery recharge apparatus, comprising:
- a battery;
an electric motor having N separate motor windings each having a first and a second leg;
a contactor having a plurality M of poles, each pole having a first side and a second side;
a 2N pole bridge inverter, the inverter having 2N switching poles and a capacitor each of the 2N switching poles coupled in parallel with the battery;
a capacitor coupled in parallel with the battery;
a recharge port coupled to the second sides of the contactor poles;
PWM control circuitry configured to control the state of each switching pole,wherein each leg of each motor winding is coupled to a phase node of a corresponding inverter switching pole, at least two of the motor winding legs are coupled to the corresponding first sides of the contactor poles, a power source/sink is coupled to the corresponding second sides of the contactor poles, and a capacitor is coupled between each pair of contactor poles andwherein the apparatus is configured so that;
in a recharge-mode the contactor is closed and electrical current from the recharge port flows through the motor windings to the inverter and from the inverter to the battery, andin a drive-mode the contactor is open and electrical current from the battery flows through the inverter to the motor windings and is blocked from flowing to the recharge port by the open contactor.
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Abstract
An integrated motor drive and battery recharge apparatus includes a battery, an electric motor having N separate motor windings each having a first and a second leg, a contactor having a plurality M of poles, each pole having a first side and a second side, the inverter having 2N switching poles and a capacitor each coupled in parallel with the battery, and PWM control circuitry configured to control the state of each switching pole. Each leg of each motor winding is coupled to a phase node of a corresponding inverter switching pole, at least two of the motor winding legs (or taps thereof) are coupled to the corresponding first sides of the contactor poles, a power source/sink is coupled to the corresponding second sides of the contactor poles, and in one aspect a capacitor is coupled between each pair of contactor poles.
42 Citations
26 Claims
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1. An integrated motor drive and battery recharge apparatus, comprising:
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a battery; an electric motor having N separate motor windings each having a first and a second leg; a contactor having a plurality M of poles, each pole having a first side and a second side; a 2N pole bridge inverter, the inverter having 2N switching poles and a capacitor each of the 2N switching poles coupled in parallel with the battery; a capacitor coupled in parallel with the battery; a recharge port coupled to the second sides of the contactor poles; PWM control circuitry configured to control the state of each switching pole, wherein each leg of each motor winding is coupled to a phase node of a corresponding inverter switching pole, at least two of the motor winding legs are coupled to the corresponding first sides of the contactor poles, a power source/sink is coupled to the corresponding second sides of the contactor poles, and a capacitor is coupled between each pair of contactor poles and wherein the apparatus is configured so that; in a recharge-mode the contactor is closed and electrical current from the recharge port flows through the motor windings to the inverter and from the inverter to the battery, and in a drive-mode the contactor is open and electrical current from the battery flows through the inverter to the motor windings and is blocked from flowing to the recharge port by the open contactor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An integrated motor drive and battery recharge apparatus, comprising:
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a battery; an electric motor having N separate motor windings each having a first and a second leg; a contactor having a plurality M of poles, each pole having a first side and a second side; a 2N pole bridge inverter, the inverter having 2N switching poles each of the 2N switching poles coupled in parallel with the battery; a first capacitor coupled in parallel with the battery; a recharge port coupled to the second sides of the contactor poles; PWM control circuitry configured to control the state of each switching pole, wherein each leg of each motor winding is coupled to a phase node of a corresponding inverter switching pole, at least two of the motor windings have taps which are coupled to the corresponding first sides of the contactor poles, and a power source/sink is coupled to the corresponding second sides of the contactor poles and wherein the apparatus is configured so that; in a recharge-mode the contactor is closed and electrical current from the recharge port flows through the motor windings to the inverter and from the inverter to the battery, and in a drive-mode the contactor is open and electrical current from the battery flows through the inverter to the motor windings and is blocked from flowing to the recharge port by the open contactor. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification
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Current AssigneeAC Propulsion, Inc.
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Original AssigneeAC Propulsion, Inc.
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InventorsRippel, Wally E.
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Primary Examiner(s)Ip, Paul
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Application NumberUS12/826,611Publication NumberTime in Patent Office1,015 DaysField of Search318/139, 318/105, 318/440, 318/497, 318/701, 318/801, 318/803, 318/771, 318/400.27, 363/37, 363/98, 180/65.1, 307/9.1, 307/10.1US Class Current318/139CPC Class CodesH02P 6/14 Electronic commutators
