Motor control method and device
AssigneeMonumo Limited
InventorMi Tang
Life of this patent
Estimating the term…
Abstract
In one embodiment, the method includes i) obtaining target data specifying desired operating parameters of a switched reluctance motor, ii) obtaining data indicative of a value of a measured drive current for each of the phase outputs of an associated inverter, iii) converting the measured drive current values from a stationary reference frame into reference current values in a rotating reference frame, iv) generating, based on the reference current values and the target data and the set of inductance values, updated reference voltage values in the rotating reference frame, v) converting the updated reference voltage values from the rotating reference frame into updated voltage values in the stationary reference frame, and vi) controlling the inverter to set the voltages of the phase outputs to the updated voltage values.
Claims17
A method for digital closed-loop control of currents driving a switched reluctance motor, SRM, the SRM connected to phase outputs of an inverter, the method comprising:
- i) obtaining a set of inductance values of the SRM comprising, for each phase, a self-inductance value and, for each pair of phases, a mutual inductance value;
- ii) obtaining target data specifying desired operating parameters of the switched reluctance motor;
- iii) obtaining data indicative of a value of a measured drive current for each of the phase outputs of the inverter;
- iv) converting the measured drive current values from a stationary reference frame into reference current values in a rotating reference frame;
- v) generating, based on the reference current values and the target data and the set of inductance values, updated reference voltage values in the rotating reference frame;
- vi) converting the updated reference voltage values from the rotating reference frame into updated voltage values in the stationary reference frame;
- and
- vii) controlling the inverter to set the voltages of the phase outputs to the updated voltage values.
A controller for closed-loop control of currents driving a switched reluctance motor, SRM, the SRM connected to phase outputs of an inverter and presenting a set of inductance values comprising, for each phase, a self-inductance value and, for each pair of phases, a mutual inductance value, the controller comprising:
- a first receiving unit for receiving target data specifying desired operating parameters of the switched reluctance motor;
- a second receiving unit for receiving data indicative of a value of a measured drive current for each of the phase outputs of the inverter;
- a first converting unit configured to convert the measured drive current values from a stationary reference frame into reference current values in a rotating reference frame;
- a computing unit configured to obtain the set of inductance values and generate based on the reference current values, the target data and the set of inductance values, updated reference voltage values in the rotating reference frame;
- a second converting unit configured to convert the updated reference voltage values from the rotating reference frame into updated voltage values in the stationary reference frame;
- and
- an output unit configured to control the inverter to set the voltages of the phase outputs to the updated voltage values.
Dependencies are inferred from the claim text.