Ac control system, apparatus and methods, for example for use with electronic machines
AssigneeExro Technologies Inc.
InventorsEric Hustedt, Gabriel Moscardi Pauka, Stephen Andrew Weeks
Life of this patent
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Abstract
AC control systems, devices and methods which can, for instance drive a power converter coupled to drive electric machines (e.g., electric motors) advantageously employs an AC controller that implements current mode control utilizing an average current controller in conjunction with and an AC peak current controller with high bandwidth. Such can advantageously employ a fixed switching frequency, and utilize a zero vector to generate the same DC link ripple current as would be generated using field orientated control (FOC) with space vector modulation (SVM).
Claims27
A method of operation in alternating current (AC) controller, comprising:
- receiving signals representative of requested currents by an average current controller;
- receiving signals representative of phase currents by the average current controller;
- producing reference currents by the average current controller based on the signals representative of requested currents and on the signals representative of the phase currents;
- and
- receiving the reference currents from the average current controller by an alternating current (AC) peak current controller;
- generating drive signals by the alternating current (AC) peak current controller based on the received reference currents;
- and
- supplying the generated drive signals to control a switching stage.
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An alternating current (AC) controller, comprising:
- a number of phase current sensors operable to sense phase currents;
- an average current controller communicatively coupled to receive signals representative of requested currents and communicatively coupled to receive signals representative of the phase currents sensed by the phase current sensors, and which produces a number of reference currents;
- and
- an alternating current (AC) peak current controller communicatively coupled to receive the reference currents from the average current controller and which generates drive signals based on the received reference currents to control a switching stage.
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-27. (canceled)
-30. (canceled)
A method of operation in a control system comprising an alternating current (AC) peak current controller, the method comprising:
- receiving signals representative of a set of phase currents by the AC peak current controller;
- receiving signals representative of a set of requested currents by the AC peak current controller;
- comparing the phase currents with the requested currents;
- determining a voltage vector to apply based on a comparison of the phase currents with the requested currents;
- enabling a state of the determined voltage vector based at least in part on a pulse width modulated (PWM) timing signal;
- and
- generating a PWM switching pattern based at least in part on the state of the determined voltage vector.
-40. (canceled)
Dependencies are inferred from the claim text.