Systems and methods for power switch control for inverter for electric vehicle
A method includes performing, by one or more controllers, operations including: receiving a pulse to control an operation of a power switch including a gate terminal; generating, based on the received pulse, a first signal to the gate terminal to increase a gate voltage level of the power switch at a first rate from an off-state gate voltage level to a first on-state gate voltage level in a first time period; and generating, based on the received pulse, a second signal to the gate terminal to increase the gate voltage level of the power switch at a second rate, less than the first rate, to a second on-state gate voltage level in a second time period subsequent to the first time period.
1 . A method comprising performing, by one or more controllers, operations including:
receiving a pulse to control an operation of a power switch including a gate terminal;
generating, based on the received pulse, a first signal to the gate terminal to increase a gate voltage level of the power switch at a first rate from an off-state gate voltage level to a first on-state gate voltage level in a first time period;
generating, based on the received pulse, a second signal to the gate terminal to increase the gate voltage level of the power switch at a second rate, less than the first rate, to a second on-state gate voltage level in a second time period subsequent to the first time period, and
generating, based on the received pulse, a third signal to the gate terminal to decrease the gate voltage level of the power switch from the first on-state gate voltage level to a third on-state gate voltage level, lower than the first on-state gate voltage level, in a third time period subsequent to the first time period and preceding the second time period.
2 . The method of claim 1 , wherein the first rate is configured to cause the power switch to transition from the off-state gate voltage level to the first on-state gate voltage level in less than 1 μs.
3 . The method of claim 1 , wherein the second time period is subsequent to a settling of a ringing phase at the gate terminal of the power switch, wherein the ringing phase is caused by the generated first signal.
4 . The method of claim 1 , wherein the second rate is configured to cause the power switch to increase to the second on-state gate voltage level with reduced oscillations relative to oscillations of the gate voltage level of the power switch in the first time period.
5 . The method of claim 1 , wherein the second signal is configured to increase the gate voltage level of the power switch from the third on-state gate voltage level to the second on-state gate voltage level.
6 . The method of claim 1 , wherein the third signal is configured to cause the power switch to decrease to the third on-state gate voltage level to avoid an overshoot of the gate voltage level of the power switch above a maximum rated gate voltage level of the power switch.
7 . The method of claim 1 , wherein the operations further include:
generating, based on the received pulse, a fourth signal to the gate terminal to decrease the gate voltage level of the power switch from the second on-state gate voltage level to the off-state gate voltage level in a fourth time period subsequent to the second time period.
8 . The method of claim 1 , further comprising:
receiving DC power from a battery;
converting the DC power to AC power using the operation of the power switch; and
providing the AC power to a motor.
9 . The method of claim 8 , wherein:
the one or more controllers, the power switch, the battery, and the motor are provided as a system in an electric vehicle.
10 . A method comprising performing, by one or more controllers, operations including:
receiving a pulse to control an operation of a power switch;
generating, based on the received pulse, a first signal to the power switch to increase a gate voltage level of the power switch at a first rate from an off-state gate voltage level to a first on-state gate voltage level in a first time period,
generating, based on the received pulse, a second signal to the power switch to increase the gate voltage level of the power switch at a second rate, less than the first rate, to a second on-state gate voltage level in a second time period subsequent to the first time period, and
generating, based on the received pulse, a third signal to the power switch to decrease the gate voltage level of the power switch from the first on-state gate voltage level to a third on-state gate voltage level, lower than the first on-state gate voltage level, in a third time period subsequent to the first time period and preceding the second time period.
11 . The method of claim 10 , wherein:
the first rate is configured to cause the power switch to transition from the off-state gate voltage level to the first on-state gate voltage level in less than 1 μs, and
the second rate is configured to cause the power switch to increase to the second on-state gate voltage level with reduced oscillations relative to oscillations of the gate voltage level of the power switch in the first time period.
12 . The method of claim 10 , wherein the second time period is subsequent to a settled ringing phase of the power switch, wherein the ringing phase is caused by the generated first signal.
13 . The method of claim 10 , wherein the second signal is configured to increase the gate voltage level of the power switch from the third on-state gate voltage level to the second on-state gate voltage level.
14 . The method of claim 10 , wherein the third signal is configured to cause the power switch to decrease to the third on-state gate voltage level to avoid an overshoot of the gate voltage level of the power switch above a maximum rated gate voltage level of the power switch.
15 . The method of claim 10 , wherein the operations further include:
generating, based on the received pulse, a fourth signal to the power switch to decrease the gate voltage level of the power switch from the second on-state gate voltage level to the off-state gate voltage level in a fourth time period subsequent to the second time period.
16 . A method comprising performing, by one or more controllers, operations including:
receiving a pulse to control an operation of a power switch;
generating a gate signal based on the pulse;
generating, based on the received gate signal, a first signal to the power switch to increase a gate voltage level of the power switch at a first rate from an off-state gate voltage level to a first on-state gate voltage level in a first time period;
generating, based on the received gate signal, a second signal to the power switch to increase the gate voltage level of the power switch at a second rate, less than the first rate, to a second on-state gate voltage level in a second time period subsequent to the first time period, and
generating, based on the received gate signal, a third signal to the power switch to decrease the gate voltage level of the power switch from the first on-state gate voltage level to a third on-state gate voltage level, lower than the first on-state gate voltage level, in a third time period subsequent to the first time period and preceding the second time period.
17 . The method of claim 16 , wherein:
the first rate is configured to cause the power switch to transition from the off-state gate voltage level to the first on-state gate voltage level in less than 1 μs, and
the second rate is configured to cause the power switch to increase to the second on-state gate voltage level with reduced oscillations relative to oscillations of the gate voltage level of the power switch in the first time period.