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US 2021/0011451 A1Published application
Stepper motor
AssigneeTexas Instruments Incorporated
InventorsRakesh Raja, Sudhir Nagaraj, Sooping Saw
Life of this patent
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Abstract
A method for electrically producing a stalled state in a stepper motor having a first coil and a second coil is provided. The method includes driving a first sinusoidal current through the first coil, and driving a second sinusoidal current through the second coil, wherein the first and second sinusoidal currents are in phase.
Claims14
A method for electrically producing a stalled state in a stepper motor having a first coil and a second coil, the method comprising:
- driving a first sinusoidal current through the first coil;
- and
- driving a second sinusoidal current through the second coil;
- wherein the first and second sinusoidal currents are in phase.
1 more element
A motor control circuit for electrically stalling a stepper motor having a first coil and a second coil, comprising:
- power transistor elements in a half-bridge arrangement coupled to first and second terminals of the first and second coils, configured to selectively switch current for the first and second coils of the stepper motor according to control signals applied to corresponding gate terminals;
- and
- control circuitry coupled to the gate terminals of the power transistor elements, configured to produce the control signals to control the power transistor elements, wherein the control signals are configured to cause the power transistor elements to drive a first sinusoidal current through the first coil and a second sinusoidal current through the second coil;
- wherein the first and second sinusoidal currents are in phase.
1 more element
Dependencies are inferred from the claim text.