In a brushless direct-current drive with a synchronous motor ( 10 ), which has a stator ( 12 ) that supports a multi-phase stator winding ( 15 ) and a rotor ( 13 ) equipped with permanent magnet poles ( 20 ), and with a switch unit ( 11 ), which precedes the stator winding ( 15 ), for commutating th
In a brushless direct-current drive with a synchronous motor ( 10 ), which has a stator ( 12 ) that supports a multi-phase stator winding ( 15 ) and a rotor ( 13 ) equipped with permanent magnet poles ( 20 ), and with a switch unit ( 11 ), which precedes the stator winding ( 15 ), for commutating the stator winding ( 15 ), in order to produce a fail-silent behavior, a field excitation winding ( 21 ) is disposed in the rotor ( 13 ), which winding can be supplied with current in the event of a malfunction so that it generates a magnetic flux oriented in the opposite direction from the magnetic flux of the permanent magnet poles ( 20 ).
대표청구항▼
1. A brushless direct-current drive, comprising:a synchronous motor ( 10 ) having a stator ( 12 ) that supports a multi-phase stator winding ( 15 ) and a rotor ( 13 ) with permanent magnet poles ( 20 ), wherein the permanent magnet poles generate a magnetic flux that penetrates the stator winding (
1. A brushless direct-current drive, comprising:a synchronous motor ( 10 ) having a stator ( 12 ) that supports a multi-phase stator winding ( 15 ) and a rotor ( 13 ) with permanent magnet poles ( 20 ), wherein the permanent magnet poles generate a magnetic flux that penetrates the stator winding ( 15 );a switch unit ( 11 ), which precedes the stator winding ( 15 ) and is controlled by an electronic control unit ( 18 ), for commutating the stator winding ( 15 ), wherein the rotor ( 13 ) contains a field excitation winding ( 21 );a circuit breaker ( 32 ), where said circuit breaker is connected between a common terminal ( 30 ) and the switch unit ( 11 ); anda controller ( 25 ), wherein said controller, in the event of a malfunction, triggers the circuit breaker ( 32 ) so that it opens, wherein said controller applies an excitation current to the field excitation winding ( 21 ) so that it generates a magnetic flux oriented in an opposite direction from the magnetic flux of the permanent magnet poles ( 20 ). 2. The direct-current drive according to claim 1, wherein the field excitation winding ( 21 ) has a number of coils ( 24 ) that corresponds to the number of permanent magnet poles ( 20 ), wherein each of the coils ( 24 ) is wound around one of the permanent magnet poles ( 20 ). 3. The direct-current drive according to claim 2, wherein the coils ( 24 ) are connected in parallel or in series and are connected to a pair of rotor slip rings ( 22 , 23 ) that are connected to the rotor ( 13 ) in a non-rotating fashion. 4. The direct-current drive according to claim 3, wherein the rotor slip rings ( 22 , 23 ) can be acted on with a direct current whose magnitude can be set by means of a controller ( 25 ). 5. The direct-current drive according to claim 4, wherein the controller ( 25 ) is integrated into the electronic control unit ( 18 ). 6. The direct-current drive according to claim 4, wherein the controller ( 25 ) has a pulse-to-width modulator. 7. The direct-current drive according to claim 4, wherein the controller ( 25 ) adjusts the DC voltage as a function of the motor temperature. 8. The direct-current drive according to claim 4, wherein the controller ( 25 ) adjusts the DC voltage as a function of a strand current flowing in the stator winding ( 15 ). 9. A brushless direct-current drive, comprising:a synchronous motor ( 10 ) having a stator ( 12 ) that supports a multi-phase stator winding ( 15 ) and a rotor ( 13 ) with permanent magnet poles ( 20 ), wherein the permanent magnet poles generate a magnetic flux that penetrates the stator winding ( 15 );a switch unit ( 11 ), which precedes the stator winding ( 15 ) and is controlled by an electronic control unit ( 18 ), for commutating the stator winding ( 15 ), wherein the rotor ( 13 ) contains a field excitation winding ( 21 ), wherein the field excitation winding has a number of coils ( 24 ) that corresponds to the number of permanent magnet poles ( 20 ), wherein each of the coils ( 24 ) is wound around on eof the permanent magnet poles ( 20 );a circuit breaker ( 32 ), wherein said circuit breaker ( 32 ) is connected between a connection terminal ( 30 ) and the switch unit ( 11 ); anda controller ( 25 ), wherein said controller, in the event of a malfunction, triggers the circuit breaker ( 32 ) so that it opens and wherein said controller applies an excitation current to the field excitation winding ( 21 ). 10. The direct-current drive according to claim 9, wherein the coils ( 24 ) are connected in parallel or in series and are connected to slip rings ( 22 , 23 ). 11. The direct-current drive according to claim 9, wherein the coils ( 24 ) are connected so that the directions of the magnetic fluxes generated in coils ( 24 ) that succeed one another in a rotation direction are oriented in opposite directions. 12. The direct-current according to claim 11, wherein the rotor slip rings ( 22 , 23 ) can be acted on with a DC voltage whose magnitude can be adjusted by means of cont roller ( 25 ). 13. The direct-current drive according to claim 11, wherein the rotor slip rings ( 22 , 23 ) can be acted on with a DC voltage whose magnitude can be adjusted by means of a pulse-to-width modulation.
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이 특허에 인용된 특허 (4)
Glennon Timothy F. (Rockford IL) Mehl Byron R. (Belvidere IL) Thollot Pierre (Rockford IL) Krinickas Alexander (Rockford IL), Brushless generator having AC excitation in generating and starting modes.
Rondot, Eric; Andrieux, Gaël, Mechatronic assembly for driving an external member using a brushless motor and a simple assembly of electronic components.
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