Method and amplifier for operating a synchronous motor

An amplifier for operating a synchronous motor, the synchronous motor comprising a first motor component, a second motor component and an encoder,

• wherein the first motor component is configured to generate a magnetic field,
• wherein the second motor component comprises a magnetic field which is static with regard to the second motor component,
• wherein in the case of a difference in the orientation between the magnetic fields of the first and the second motor component a relative movement between the first and the second motor component occurs which is determinable by means of the encoder,
• wherein the amplifier comprises a power unit and a control unit,
• wherein the power unit is configured to provide an electric current to the first motor component for generating a magnetic field in different orientations,
• wherein the control unit is configured to control the power unit and to evaluate the relative movement determined by means of the encoder,
• wherein the control unit is further configured to initiate a gradual alignment of the magnetic field of the first motor component in the direction of the magnetic field of the second motor component within the framework of starting the operation of the synchronous motor, which is effected in that the control unit
• initiates in a method step a) the generation of a magnetic field by means of the first motor component in a predetermined orientation in order to generate a relative movement between the first and the second motor component limited to a predetermined value,
• determines in a method step b) a direction of movement of the limited relative movement between the first and the second motor component by means of the encoder, and
• repeats the two method steps a) and b) until a change in the direction of movement of the limited relative movement between the first and the second motor component occurs,
• wherein during repetition of the method steps a) and b) the control unit in each case initiates in method step a) that the magnetic field is generated by means of the first motor component having a changed orientation with regard to the previously generated magnetic field, wherein the orientation of the magnetic field is respectively changed by a predetermined orientation section and depending on the direction of movement determined by means of the encoder.

A system comprising an amplifier and a synchronous motor, wherein the synchronous motor comprises a first motor component, a second motor component and an encoder,

• wherein the first motor component is configured to generate a magnetic field,
• wherein the second motor component comprises a magnetic field which is static with regard to the second motor component,
• wherein in the case of a difference in the orientation between the magnetic fields of the first and the second motor component a relative movement between the first and the second motor component occurs which is determinable by means of the encoder,
• wherein the amplifier comprises a power unit and a control unit,
• wherein the power unit is configured to provide an electric current to the first motor component for generating a magnetic field in different orientations,
• wherein the control unit is configured to control the power unit and to evaluate the relative movement determined by means of the encoder,
• wherein the control unit is further configured to initiate a gradual alignment of the magnetic field of the first motor component in the direction of the magnetic field of the second motor component within the framework of starting the operation of the synchronous motor, which is effected in that the control unit
• initiates in a method step a) the generation of a magnetic field by means of the first motor component in a predetermined orientation in order to generate a relative movement between the first and the second motor component limited to a predetermined value,
• determines in a method step b) a direction of movement of the limited relative movement between the first and the second motor component by means of the encoder, and
• repeats the two method steps a) and b) until a change in the direction of movement of the limited relative movement between the first and the second motor component occurs,
• wherein during repetition of the method steps a) and b) the control unit in each case initiates in method step a) that the magnetic field is generated by means of the first motor component having a changed orientation with regard to the previously generated magnetic field, wherein the orientation of the magnetic field is respectively changed by a predetermined orientation section and depending on the direction of movement determined by means of the encoder.