Method and system for evaluating electrical connections between a motor controller and motor
First Claim
1. A method for determining whether a multi-phase motor is properly connected to an inverter, the method comprising:
- establishing a monotonically varying test sequence of test rotor angular positions associated with application of corresponding pairs of direct d-q-axis voltage commands to the motor, each of the pairs of direct d-q axis voltage commands comprising a direct-axis command and a quadrature-axis command;
converting or transforming the direct d-q-axis voltage commands into multiple phase voltages for each corresponding input phase terminal of the multi-phase motor, the direct d-q-axis voltage commands processed as modulated signals for application to each corresponding input phase terminal;
rotating the rotor of the motor in response to the application of the direct d-q-axis voltage commands associated with the corresponding established monotonically varying test sequence of test rotor angular positions; and
determining that conductor connections between the inverter and the motor are correct if a calculated shaft speed sign is positive in response to the application of the direct d-q-axis voltage commands associated with the monotonically varying test sequence of rotor angular positions that monotonically increases or if a calculated shaft speed sign is negative in response to the application of the direct d-q-axis voltage commands associated with the monotonically varying test sequence of rotor angular positions that monotonically decreases.
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Accused Products
Abstract
A pair of direct d-q-axis voltage commands is associated with a monotonically varying test sequence of test rotor angular positions to determine a correct rotational direction of a rotor of the motor in response to application of the pair of direct d-q-axis voltage commands to the motor. The rotor of the motor rotates (e.g., self spins in a diagnostic mode) in response to the applied direct d-q-axis voltage commands and applied monotonically varying test sequence of test rotor angular positions. The primary positioning module or data processor determines that conductor connections between the inverter (e.g., motor controller) and the motor are correct if the calculated shaft speed sign is positive with respect to an applied monotonically varying test sequence of rotor angular positions that monotonically increases.
15 Citations
18 Claims
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1. A method for determining whether a multi-phase motor is properly connected to an inverter, the method comprising:
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establishing a monotonically varying test sequence of test rotor angular positions associated with application of corresponding pairs of direct d-q-axis voltage commands to the motor, each of the pairs of direct d-q axis voltage commands comprising a direct-axis command and a quadrature-axis command; converting or transforming the direct d-q-axis voltage commands into multiple phase voltages for each corresponding input phase terminal of the multi-phase motor, the direct d-q-axis voltage commands processed as modulated signals for application to each corresponding input phase terminal; rotating the rotor of the motor in response to the application of the direct d-q-axis voltage commands associated with the corresponding established monotonically varying test sequence of test rotor angular positions; and determining that conductor connections between the inverter and the motor are correct if a calculated shaft speed sign is positive in response to the application of the direct d-q-axis voltage commands associated with the monotonically varying test sequence of rotor angular positions that monotonically increases or if a calculated shaft speed sign is negative in response to the application of the direct d-q-axis voltage commands associated with the monotonically varying test sequence of rotor angular positions that monotonically decreases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for determining whether a multi-phase motor is properly connected to an inverter, the method comprising:
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activating a plurality of semiconductor switches to apply the direct phase current commands to achieve a respective target phase winding current in the motor that align the motor in a known aligned position; determining if an observed rotor position is aligned with the known aligned position in response to application of the direct phase current commands; and identifying improper wiring connection between the inverter and the motor if the observed rotor position is not aligned with the known aligned position above a tolerable range. - View Dependent Claims (11)
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12. A system for determining whether a multi-phase motor is properly connected to an inverter, the system comprising:
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a data processor for establishing a monotonically varying test sequence of test rotor angular positions associated with application of corresponding pairs of direct d-q-axis voltage commands to the motor, each of the pairs of direct d-q axis voltage commands comprising a direct-axis command and a quadrature-axis command; a pulse width modulation generation module for converting or transforming the direct d-q-axis voltage commands into multiple phase voltages for each corresponding input phase terminal of the multi-phase motor; an inverter switching circuit for processing the direct d-q-axis voltage commands processed as modulated signals for application to each corresponding input phase terminal of the motor; a rotor of the motor rotated in response to the application of the direct d-q-axis voltage commands associated with the corresponding established monotonically varying test sequence of test rotor angular positions; and the data processor adapted to determine that conductor connections between the inverter and the motor are correct if a calculated shaft speed sign is positive in response to the application of the direct d-q-axis voltage commands associated with the monotonically varying test sequence of rotor angular positions that monotonically increases. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification