EVALUATION OF RESOLVER SENSOR SIGNALS

• US 20140142782A1
• Filed: 05/15/2012
• Published: 05/22/2014
• Est. Priority Date: 07/04/2011
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Feuchter, Wilfried, Fu, Chengxuan, Bischof, Rene
• Granted Patent: US 9,315,106 B2
• Time in Patent Office: Days
• US Class Current: 701/1
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 3/0038 relating to sensors
• CPC Class Codes: B60L 3/0061 relating to electrical machines
• CPC Class Codes: B60L 3/0084 relating to control modules
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: G01D 5/2073 by movement of a single coil with respect to two or more coils
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility

Abstract

Circuit (2) for evaluating resolver sensor signals (28) in a vehicle, having a resolver sensor (4), set up to pick up a rotary movement of a rotor (6) in an electrical machine (16), and a processor element (12), wherein the resolver sensor (4) is set up to output at least one sinusoidal or cosinusoidal amplitude-modulated analogue signal that is characteristic of the rotary movement of the rotor (6), characterized in that the processor element (12) has a data processing unit (12a), a resolver sensor actuation unit (12b) and a resolver sensor evaluation unit (12c), wherein the analogue signal from the resolver sensor (4) is connected directly to the resolver sensor evaluation unit (12c).

Claims

1. A circuit for evaluating resolver sensor signals in a vehicle, the circuit comprising:

a resolver sensor configured to pick up a rotary movement of a rotor of an electrical machine; and

a processor element;

wherein the resolver sensor is designed to output at least one sinusoidal or cosinusoidal amplitude-modulated analog signal which is characteristic of the rotary movement of the rotor;

wherein

the processor element has a data processing unit, a resolver sensor actuation unit and a resolver sensor evaluation unit,

the analog signal of the resolver sensor being connected to the resolver sensor evaluation unit.

2. The circuit as claimed in claim 1,

wherein the resolver sensor actuation unit supplies a pulse-width-modulated signal for actuating the resolver sensor, and also a synchronization signal to the resolver sensor evaluation unit.

3. The circuit as claimed in claim 2,

wherein the circuit has a digital/analog converter element for converting the pulse-width-modulated signal into a sinusoidal analog exciter signal for actuating the resolver sensor.

4. The circuit as claimed in claim 3,

wherein the digital/analog converter element is in the form of a low-pass element.

5. The circuit as claimed in claim 1,

wherein the resolver sensor evaluation unit is in the form of an analog/digital converter.

6. The circuit as claimed in claim 2,

wherein the synchronization signal provides demodulation of the analog signal of the resolver sensor by the resolver sensor evaluation unit.

7. The circuit as claimed in claim 2,

wherein a maximum of the synchronization signal triggers analog/digital conversion of the current value of at least one analog signal of the resolver sensor by the resolver sensor evaluation unit.

8. The circuit as claimed in claim 7,

wherein the analog/digital conversion supplies an envelope of the at least one sinusoidal or cosinusoidal amplitude-modulated analog signal to the data processing unit of the processor element.

9. A controller for a vehicle, having a circuit as claimed in claim 1.

10. A vehicle having a circuit as claimed in claim 1.

11. A vehicle having a controller as claimed in claim 9.