Control device for a motor and method for controlling said motor
AssigneeContinental Automotive GmbH
InventorsThomas Maier, Christoph Schikora, Thomas Wiercioch
Life of this patent
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Abstract
A control device is for a motor, especially a brushless DC motor. The control device contains a bridge circuit for generating a rotating field for the motor and a sensor system for detecting a position of a rotor of the motor, a control signal for the bridge circuit being derivable from the signal representing the rotor position. The sensor system includes an absolute value transmitter which detects the absolute position of the rotor and which is configured to derive at least one incremental signal from the absolute position and to make it directly available to a control component for controlling the bridge circuit for commuting the motor.
Claims20
A control apparatus for a motor, including a brushless direct-current motor, the control apparatus comprising:
- a bridge circuit for producing a rotating field for the motor;
- a drive module;
- and
- a sensor system having an absolute value transmitter detecting an absolute position of a rotor of the motor, deriving at least one incremental signal from the absolute position, and making the at least one incremental signal available directly to said drive module for driving said bridge circuit for commutation of the motor;
- and
- a microcontroller, to which said absolute value transmitter supplies an absolute position signal, which represents the absolute position, independently of the commutation;
- and, wherein said absolute value produces a simulated Hall signal as the at least one incremental signal.
A method for controlling a motor, including a brushless direct-current motor, which comprises the steps of:
- producing, via a bridge circuit, a rotating field for the motor;
- detecting, via a sensor system, a position of a rotor of the motor;
- deriving a drive signal for the bridge circuit from a signal which represents a rotor position;
- detecting, via an absolute value transmitter in the sensor system, an absolute position of the rotor;
- and
- deriving at least one incremental signal from the absolute position and making the at least one incremental signal available directly to a drive module for driving the bridge circuit for commutation of the motor;
- and
- supplying, via the absolute value transmitter, an absolute position signal, which represents the absolute position, to a microcontroller independently of the commutation;
- and producing, via absolute value transmitter, a simulated Hall signal as the incremental signal.
Dependencies are inferred from the claim text.