Voltage boost module for a power converter
OwnerHua Qiang Li, Yaojin Mo +2inventors
InventorsHua Qiang Li, Yaojin Mo, Zhe Zhang, Jimmy Qi
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Abstract
In one aspect, a power converter includes: an energy storage apparatus; an inverter electrically coupled to the energy storage apparatus; and a voltage boost system configured to: determine a modulation index based on a DC voltage of the energy storage apparatus and a target output voltage of the inverter; and determine whether the target output voltage is in a voltage boost region based on the modulation index; if the target output voltage is in the voltage boost region: determine an adjustment value based on the modulation index; and adjust one or more of the target output voltage and an associated output voltage phase angle based on the adjustment value.
Claims14
A power converter comprising:
- an energy storage apparatus;
- an inverter electrically coupled to the energy storage apparatus;
- and
- a voltage boost system configured to:
- determine a modulation index based on a DC voltage of the energy storage apparatus and a target output voltage of the inverter;
- and
- determine whether the target output voltage is in a voltage boost region based on the modulation index;
- if the target output voltage is in the voltage boost region:
- determine an adjustment value based on the modulation index;
- and adjust one or more of the target output voltage and an associated output voltage phase angle based on the adjustment value.
A control system for an inverter, the control system comprising:
- a boost module configured to:
- access a target output voltage and target output phase angle of the inverter;
- determine a modulation index based on a DC bus voltage of an inverter and the target output voltage of the inverter;
- determine whether the target output voltage is in a linear region of the inverter or a voltage boost region of the inverter based on the modulation index;
- if the target output voltage is in the voltage boost region:
- determine an adjustment value based on the modulation index;
- and adjust one or more of the target output voltage and the target output voltage phase angle based on the adjustment value;
- and
- if the target output voltage is in the linear region of the inverter, the boost module is configured to not adjust the target output voltage and the target output phase angle;
- and
- a command module configured to:
- determine an inverter command based on the target output voltage and the target output voltage phase angle;
- and
- control the inverter based on the inverter command.
A method comprising:
- determining a modulation index based on a measured DC bus voltage of an inverter and a target output voltage of the inverter;
- determining whether a target output voltage of an inverter is in a space vector pulse width modulation (SVPWM) linear region based on the modulation index;
- if the target output voltage of the inverter is outside of the linear region:
- determining an angle adjustment value based on the modulation index;
- and
- adjusting one of the target output voltage and a target output phase angle based on the angle adjustment value;
- and
- if the target output voltage of the inverter is in the linear region, not adjusting the target output voltage or the target output phase angle.
Dependencies are inferred from the claim text.