US 2010/0072932 A1 · Fail-Passive Electro-Mechanical Actuator Utilizing Dual Controllers And A Two-Phase Brushless Motor

Abstract

A fail-passive electro-mechanical actuator utilizing dual controllers and a two-phase brushless motor is provided. In one embodiment, the invention relates to a fail passive system for controlling a two phase brushless motor, the system including the two phase brushless motor including a stator, a rotor, a first winding electromagnetically coupled to the rotor, and a second winding electromagnetically coupled to the rotor, first control circuitry coupled to the first winding, the first control circuitry configured to provide a first current to the first winding, second control circuitry coupled to the second winding, the second control circuitry to provide a second current to the second winding, wherein the first control circuitry is configured to receive a first commanded value from an external control circuit, wherein the second control circuitry is configured to receive a second commanded value from the external control circuit, wherein the first control circuitry is configured to receive a negated form of the second commanded value from the second circuitry, wherein the second control circuitry is configured to receive a negated form of the first commanded value from the first circuitry, and wherein the first control circuitry and the second control circuitry are configured to concurrently control a movement of the rotor.

Claims23

Dependent claims

A fail passive system for controlling two phase brushless motors, the system comprising:

a two phase brushless motor comprising:
a stator;
a rotor;
a first winding electromagnetically coupled to the rotor;
and
a second winding electromagnetically coupled to the rotor;
first control circuitry coupled to the first winding, the first control circuitry configured to provide a first current to the first winding;
second control circuitry coupled to the second winding, the second control circuitry to provide a second current to the second winding;
wherein the first control circuitry is configured to receive a first commanded value from an external control circuit;
wherein the second control circuitry is configured to receive a second commanded value from the external control circuit;
wherein the first control circuitry is configured to receive a negated form of the second commanded value from the second circuitry;
wherein the second control circuitry is configured to receive a negated form of the first commanded value from the first circuitry;
and
wherein the first control circuitry and the second control circuitry are configured to concurrently control a movement of the rotor.

11 more elements

A method for controlling a two phase brushless motor system comprising a rotor, a stator having a first winding and a second winding, a first control circuitry for controlling a movement of the rotor by providing a first current to the first winding, and a second control circuitry for controlling the movement of the rotor by providing a second current to the second winding, the method comprising:

receiving, at the first circuitry, a first commanded value;
receiving, at the second circuitry, a second commanded value;
receiving, at the first circuitry, a negated form of the second commanded value;
receiving, at the second circuitry, a negated form of the first commanded value;
selecting, at the first circuitry, a first value, based on a first preselected criteria, from a group consisting of the first commanded value, the negated second commanded value and a first default value;
selecting, at the second circuitry, a second value, based on a second preselected criteria, from a group consisting of the negated first commanded value, the second commanded value and a second default value;
generating the first current, based on the first value, for the first winding;
generating the second current, based on the second value, for the second winding.

5 more elements

Dependencies are inferred from the claim text.

Fail-Passive Electro-Mechanical Actuator Utilizing Dual Controllers And A Two-Phase Brushless Motor

Life of this patent

Fail-Passive Electro-Mechanical Actuator Utilizing Dual Controllers And A Two-Phase Brushless Motor

Life of this patent

Abstract

Claims23