摘要:
A gate driver for a power switch, comprising a gate drive circuit coupled to the gate of the power switch for at least one of turning on and turning off the power switch; a gate voltage control circuit in the gate drive circuit for controlling a voltage applied to the gate of the power switch during at least one of turning on and turning off the power switch; and a signal supplied to the gate voltage control circuit indicative of a voltage rate of change per unit time to be applied in at least one of turning on and turning off the power switch.
摘要:
A circuit for providing power factor correction includes a boost converter circuit with a boost inductance and a power factor correction switch and a control circuit. The control circuit provides a pulse width modulated signal to control the on time of a PFC switch, and also includes a power factor correction pulse width modulated device receiving as inputs a rectified AC input voltage, a DC bus voltage, a signal proportional to the current through the inductor and a reference current signal. The power factor correction pulse width modulated device also includes a pulse width modulated generator operable to provide the pulse width modulated signal to control the on time of the PFC circuit and a pulse width modulated blanking device operable to provide an enable/disable signal to disable the pulse width modulated generator when predetermined conditions are met.
摘要:
A power inverter control adjusts input power to track with output power to reduce energy handling requirements for an inverter DC bus. Input power to the power inverter circuit is measured and compared with a measurement of inverter output power. The comparison result is applied to a power factor correction circuit to adjust input power to track with output power, while obtaining a good power factor for the power inverter circuit. The energy requirements and ripple voltages or ripple currents on the DC bus are reduced, leading to a reduction in rating specifications for passive energy storage elements on the DC bus.
摘要:
A gate driver for a power switch, comprising a gate drive circuit coupled to the gate of the power switch for at least one of turning on and turning off the power switch; a gate voltage control circuit in the gate drive circuit for controlling a voltage applied to the gate of the power switch during at least one of turning on and turning off the power switch; and a signal supplied to the gate voltage control circuit indicative of a voltage rate of change per unit time to be applied in at least one of turning on and turning off the power switch.
摘要:
A circuit for providing power factor correction includes a boost converter circuit with a boost inductance and a power factor correction switch and a control circuit. The control circuit provides a pulse width modulated signal to control the on time of a PFC switch, and also includes a power factor correction pulse width modulated device receiving as inputs a rectified AC input voltage, a DC bus voltage, a signal proportional to the current through the inductor and a reference current signal. The power factor correction pulse width modulated device also includes a pulse width modulated generator operable to provide the pulse width modulated signal to control the on time of the PFC circuit and a pulse width modulated blanking device operable to provide an enable/disable signal to disable the pulse width modulated generator when predetermined conditions are met.
摘要:
A motor drive system control provides global closed loop feedback to cooperatively operate system components to adaptively reduce noise and provide noise cancellation feedback. An active EMI filter reduces differential and common mode noise on an input and provides a noise level indication to a system controller. Power switches in both a power converter and power inverter are cooperatively controlled with dynamic dv/dt control to reduce switching noise according to a profile specified by the controller. The dv/dt control is provided as an analog signal to a high voltage IC and codified as a pulse width for a level shifting circuit supplying control signals to the high voltage gate drive. A noise extraction circuit and technique obtain fast noise sampling to permit noise cancellation and adaptive noise reduction.
摘要翻译:电机驱动系统控制提供全局闭环反馈以协同操作系统组件以自适应地降低噪声并提供噪声消除反馈。 有源EMI滤波器可减少输入端的差分和共模噪声,并向系统控制器提供噪声电平指示。 电源转换器和电源逆变器中的电源开关通过动态dv / dt控制协同控制,以根据控制器指定的配置文件降低开关噪声。 dv / dt控制作为模拟信号提供给高电压IC,并被编码为用于向高压栅极驱动器提供控制信号的电平移位电路的脉冲宽度。 噪声提取电路和技术获得快速噪声采样,以允许噪声消除和自适应降噪。
摘要:
A motor drive system control provides global closed loop feedback to cooperatively operate system components to adaptively reduce noise and provide noise cancellation feedback. An active EMI filter reduces differential and common mode noise on an input and provides a noise level indication to a system controller. Power switches in both a power converter and power inverter are cooperatively controlled with dynamic dv/dt control to reduce switching noise according to a profile specified by the controller. The dv/dt control is provided as an analog signal to a high voltage IC and codified as a pulse width for a level shifting circuit supplying control signals to the high voltage gate drive. A noise extraction circuit and technique obtain fast noise sampling to permit noise cancellation and adaptive noise reduction.
摘要翻译:电机驱动系统控制提供全局闭环反馈以协同操作系统组件以自适应地降低噪声并提供噪声消除反馈。 有源EMI滤波器可减少输入端的差分和共模噪声,并向系统控制器提供噪声电平指示。 电源转换器和电源逆变器中的电源开关通过动态dv / dt控制协同控制,以根据控制器指定的配置文件降低开关噪声。 dv / dt控制作为模拟信号提供给高电压IC,并被编码为用于向高压栅极驱动器提供控制信号的电平移位电路的脉冲宽度。 噪声提取电路和技术获得快速噪声采样,以允许噪声消除和自适应噪声降低。
摘要:
A motor drive system control provides global closed loop feedback to cooperatively operate system components to adaptively reduce noise and provide noise cancellation feedback. An active EMI filter reduces differential and common mode noise on an input and provides a noise level indication to a system controller. Power switches in both a power converter and power inverter are cooperatively controlled with dynamic dv/dt control to reduce switching noise according to a profile specified by the controller. The dv/dt control is provided as an analog signal to a high voltage IC and codified as a pulse width for a level shifting circuit supplying control signals to the high voltage gate drive. A noise extraction circuit and technique obtain fast noise sampling to permit noise cancellation and adaptive noise reduction.
摘要翻译:电机驱动系统控制提供全局闭环反馈以协同操作系统组件以自适应地降低噪声并提供噪声消除反馈。 有源EMI滤波器可减少输入端的差分和共模噪声,并向系统控制器提供噪声电平指示。 电源转换器和电源逆变器中的电源开关通过动态dv / dt控制协同控制,以根据控制器指定的配置文件降低开关噪声。 dv / dt控制作为模拟信号提供给高电压IC,并被编码为用于向高压栅极驱动器提供控制信号的电平移位电路的脉冲宽度。 噪声提取电路和技术获得快速噪声采样,以允许噪声消除和自适应降噪。