Power factor correction with variable bus voltage
First Claim
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1. A controller comprising:
- a bus voltage command module that;
(i) outputs a commanded bus voltage for a direct current (DC) bus electrically connected between a power factor correction (PFC) module and an inverter power module that drives a motor;
(ii) sets the commanded bus voltage equal to a measured voltage of the DC bus when the controller transitions from an off state to an on state; and
(iii) sets the commanded bus voltage equal to a predetermined startup voltage for a predetermined startup period after the controller transitions from the off state to the on state;
a rate limiting module that ramps a rate limited voltage toward the commanded bus voltage during the predetermined startup period based on a predetermined rate limit; and
a PFC control module that controls the PFC module to create a voltage on the DC bus that is based on the rate limited voltage.
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Abstract
A controller includes a voltage determination module, a bus voltage command module, and a power factor correction (PFC) control module. The voltage determination module determines a desired direct current (DC) bus voltage for a DC bus electrically connected between a PFC module and an inverter power module that drives a motor. The voltage determination module determines the desired DC bus voltage based on at least one of torque of the motor and speed of the motor. The bus voltage command module determines a commanded bus voltage based on the desired DC bus voltage. The PFC control module controls the PFC module to create a voltage on the DC bus that is based on the commanded bus voltage.
277 Citations
20 Claims
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1. A controller comprising:
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a bus voltage command module that; (i) outputs a commanded bus voltage for a direct current (DC) bus electrically connected between a power factor correction (PFC) module and an inverter power module that drives a motor; (ii) sets the commanded bus voltage equal to a measured voltage of the DC bus when the controller transitions from an off state to an on state; and (iii) sets the commanded bus voltage equal to a predetermined startup voltage for a predetermined startup period after the controller transitions from the off state to the on state; a rate limiting module that ramps a rate limited voltage toward the commanded bus voltage during the predetermined startup period based on a predetermined rate limit; and a PFC control module that controls the PFC module to create a voltage on the DC bus that is based on the rate limited voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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generating, using a controller, a commanded bus voltage for a direct current (DC) bus electrically connected between a power factor correction (PFC) module and an inverter power module that drives a motor; setting, using the controller, the commanded bus voltage equal to a measured voltage of the DC bus when the controller transitions from an off state to an on state; setting, using the controller, the commanded bus voltage equal to a predetermined startup voltage for a predetermined startup period after the controller transitions from the off state to the on state; ramping, using the controller, a rate limited voltage toward the commanded bus voltage during the predetermined startup period based on a predetermined rate limit; and controlling, using the controller, the PFC module to create a voltage on the DC bus that is based on the rate limited voltage. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method comprising:
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generating a commanded bus voltage for a direct current (DC) bus electrically connected between a power factor correction (PFC) module and an inverter power module that drives a motor; setting the commanded bus voltage equal to a measured voltage of the DC bus upon controller power-off; setting the commanded bus voltage equal to a predetermined startup voltage for a predetermined startup period upon controller power-on; ramping a rate limited voltage toward the commanded bus voltage during the predetermined startup period based on a predetermined rate limit; and controlling the PFC module to create a voltage on the DC bus that is based on the rate limited voltage. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification