Method and device for starting an electric motor
AssigneeBSH Bosch und Siemens Hausgeraete GmbH
InventorsFalko Abel, Eberhard Weidner
Life of this patent
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Abstract
A method for starting an electric motor having a rotor, comprising the following steps:—driving the rotor with a first torque in a first rotational direction, wherein a maximum value of the first torque is not higher than a maximum countertorque acting counter to the rotation of the rotor, so that the rotor comes to a standstill in a first stationary position;—driving the rotor starting from the first stationary position in a second rotational direction that is counter to the first rotational direction until the rotor comes to a standstill in a predefined second stationary position; and—starting from the rotor in the first rotational direction starting from the second stationary position.
Claims21
A method for starting up an electric motor, which has a rotor, comprising the steps of:
- driving the rotor in a first direction of rotation with a first torque, wherein a maximum value of the first torque is not greater than a maximum counter torque opposing the rotation of the rotor, causing the rotor to come to a standstill in a first stationary position;
- starting from the first stationary position, driving the rotor in a second direction of rotation, which is opposite from the first direction of rotation, until the rotor comes to standstill in a predefined second stationary position;
- and
- starting from the second stationary position, starting up the rotor in the first direction of rotation.
A method for starting up an electric motor, which has phase windings and a rotor, comprising the steps of:
- producing a torque which moves the rotor in a first direction of rotation, in order to start up the electric motor;
- when the start-up of the electric motor is unsuccessful
- driving the rotor in a first direction of rotation with a first torque, wherein a maximum value of the first torque is not greater than a maximum counter torque opposing the rotation of the rotor, causing the rotor to come to a standstill in a first stationary position;
- starting from the first stationary position, driving the rotor in a second direction of rotation, which is opposite from the first direction of rotation, until the rotor comes to standstill in a predefined second stationary position;
- and
- starting from the second stationary position, starting up the rotor in the first direction of rotation.
A device for starting up an electric motor with a rotor designed as the drive for a compressor having a compression point, in particular a compressor in a refrigerator, wherein the device is configured
- to drive the rotor in a first direction of rotation with a first torque, wherein a maximum value of the first torque is not greater than a maximum counter torque opposing the rotation of the rotor, causing the rotor to come to a standstill in a first stationary position;
- starting from the first stationary position, to drive the rotor in a second direction of rotation, which is opposite from the first direction of rotation, until the rotor comes to standstill in a predefined second stationary position;
- and
- starting from the second stationary position, to start up the rotor in the first direction of rotation;
- wherein the maximum counter torque corresponds to a counter torque at the compression point.
An electric motor with a rotor designed as the drive for a compressor having a compression point, in particular a compressor in a refrigerator, the electric motor comprising a device for starting up the electric motor wherein the device is configured
- to drive the rotor in a first direction of rotation with a first torque, wherein a maximum value of the first torque is not greater than a maximum counter torque opposing the rotation of the rotor, causing the rotor to come to a standstill in a first stationary position;
- starting from the first stationary position, to drive the rotor in a second direction of rotation, which is opposite from the first direction of rotation, until the rotor comes to standstill in a predefined second stationary position;
- and
- starting from the second stationary position, to start up the rotor in the first direction of rotation;
- wherein the maximum counter torque corresponds to a counter torque at the compression point.
Dependencies are inferred from the claim text.