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US 11,387,763 B2Granted
Motor control system, controller, and method
AssigneeEaton Intelligent Power Limited
InventorsSayeed A. Mir, John D. Neely, Stanley L. Seely, John M. White
Life of this patent
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Abstract
A method of controlling an electric motor includes determining a PWM control signal, analyzing the PWM control signal to determine if components of the PWM signal are within a threshold amount of each other, applying duty-cycle blanking to the PWM control signal, if the components of the PWM control signal are within the threshold amount of each other, to generate an adjusted PWM control signal, and controlling the electric motor with the adjusted the PWM signal to limit parasitic effects.
Claims19
A method of controlling an electric motor, the method comprising:
- determining a PWM (pulse width modulation) control signal;
- analyzing the PWM control signal to determine if duty-cycle components of the PWM control signal are within a threshold amount of each other;
- applying duty-cycle blanking to the PWM control signal, if the duty-cycle components of the PWM control signal are within the threshold amount of each other, to generate an adjusted PWM control signal;
- and
- controlling the electric motor with the adjusted PWM control signal to limit parasitic effects;
- wherein the PWM control signal includes a first duty-cycle component and a second duty-cycle component;
- wherein the first duty-cycle component includes a smaller duty cycle than the second duty-cycle component;
- wherein applying duty-cycle blanking includes advancing the first duty-cycle component by a first amount corresponding to half of a total of the first duty-cycle component added with the second duty-cycle component less the threshold amount, to generate an adjusted first duty-cycle component of the adjusted PWM control signal;
- and
- wherein applying duty-cycle blanking includes delaying the second duty-cycle component by a second amount corresponding to half of a total of the first duty-cycle component added with the second duty-cycle component plus the threshold amount, to generate an adjusted second duty-cycle component of the adjusted PWM control signal.
7 more elements
A control system, comprising:
- a plurality of switches configured to electrically connect a power source with an electrical component;
- and
- an electronic controller;
- wherein the electronic controller is configured to:
- receive one or more inputs;
- generate a PWM (pulse width modulation) control signal, according to the one or more inputs, for controlling the plurality of switches;
- analyze the PWM control signal to determine if components of the PWM control signal are within a threshold amount of each other;
- adjust the PWM control signal, if the components are within the threshold amount, to produce an adjusted control signal;
- and
- control the plurality of switches via the adjusted control signal to limit parasitic effects;
- wherein the PWM control signal includes a first duty-cycle component and a second duty-cycle component;
- wherein the first duty-cycle component includes a smaller duty cycle than the second duty-cycle component;
- wherein the adjusted control signal includes applying a duty-cycle blanking advancing the first duty-cycle component by a first amount corresponding to half of a total of the first duty-cycle component added with the second duty-cycle component less the threshold amount, to generate an adjusted first duty-cycle component of the adjusted PWM control signal;
- and
- wherein applying the duty-cycle blanking further includes delaying the second duty-cycle component by a second amount corresponding to half of a total of the first duty-cycle component added with the second duty-cycle component plus the threshold amount, to generate an adjusted second duty-cycle component of the adjusted PWM control signal.
12 more elements
A non-transitory computer readable storage medium storing instructions, which when executed by a processor of an electronic controller, causes the electronic controller to:
- receive one or more inputs;
- generate a PWM (pulse width modulation) control signal for controlling an electrical component according to the one or more inputs;
- analyze the control signal to determine if two components of the control signal are within a threshold amount of each other;
- adjust the control signal, if the two components are within the threshold amount, to produce an adjusted control signal;
- and
- control a plurality of electrical switches via the adjusted control signal to limit parasitic effects;
- wherein the PWM control signal includes a first duty-cycle component and a second duty-cycle component;
- wherein the first duty-cycle component includes a smaller duty cycle than the second duty-cycle component;
- wherein the adjusted control signal includes applying a duty-cycle blanking advancing the first duty-cycle component by a first amount corresponding to half of a total of the first duty-cycle component added with the second duty-cycle component less the threshold amount, to generate an adjusted first duty-cycle component of the adjusted PWM control signal;
- and
- wherein applying the duty-cycle blanking further includes delaying the second duty-cycle component by a second amount corresponding to half of a total of the first duty-cycle component added with the second duty-cycle component plus the threshold amount, to generate an adjusted second duty-cycle component of the adjusted PWM control signal.
8 more elements
Dependencies are inferred from the claim text.