Switch Element Gate Circuit With Variable Pre-Control Voltage
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Solution Overview
Problem
Switching losses in semiconductor switching elements, such as IGBTs, occur due to fixed actuation voltages during state transitions, leading to increased heat generation and reduced efficiency, which shortens the maintenance cycle of devices.
Innovation Solution
A circuit arrangement that provides a variable pre-actuation voltage dependent on the switching state of the switching element, allowing the actuation voltage to change between two or more voltage levels during state transitions to minimize switching losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed actuation voltages are used to switch the switching element, then the switching element can be reliably switched on and off, but switching losses increase due to heat generation during state transitions
Solution Approach 1:
The patent applies dynamics by making the actuation voltage variable rather than fixed. The actuation circuit dynamically adjusts the pre-actuation voltage level based on the current switching state and transition requirements, allowing optimization of switching performance while minimizing energy losses during state transitions.
Solution Approach 2:
The patent implements parameter changes by varying the voltage level applied to the control connection during different switching phases. The actuation circuit changes the pre-actuation voltage parameter from a first voltage level during the first switching state to a second voltage level during the second switching state, optimizing switching characteristics and reducing losses.
2Stability of the object's composition
If fixed actuation voltages are applied to the gate connection, then the switching element maintains stable operation, but switching efficiency decreases due to heat generation
Solution Approach 1:
The actuation circuit dynamically adapts the pre-actuation voltage based on the switching state, enabling efficient switching while maintaining stable operation. The voltage is adjusted in real-time during transitions rather than remaining fixed, improving switching efficiency without compromising stability.
Solution Approach 2:
The actuation circuit applies a pre-actuation voltage before the actual switching transition occurs. This preliminary action prepares the switching element for the upcoming state change, reducing the energy required for switching and minimizing heat generation while maintaining stable operation.
3Speed
If high actuation voltages are used to ensure rapid switching, then switching speed improves, but energy consumption and heat generation increase
Solution Approach 1:
The patent changes the voltage parameter dynamically based on switching requirements. Rather than always applying high voltage, the actuation circuit adjusts the pre-actuation voltage level according to the specific switching state and transition needs, achieving rapid switching when necessary while minimizing energy consumption during other phases.
Solution Approach 2:
The actuation circuit applies only the necessary voltage level required for effective switching at any given moment. Rather than continuously applying maximum voltage, it uses partial action by adjusting the pre-actuation voltage to the minimum effective level needed for each switching phase, reducing overall energy consumption while maintaining switching speed.
Data Source
AI summary
The invention relates to a circuit arrangement (100), comprising a control circuit (104) and a switch element (101) for switching between a first and a second switching state of the switch element (101). The control circuit (104) is designed to provide a variable pre-control voltage dependent on the switching state of the switch element. The pre-control voltage is a voltage that is switched as the control voltage at the switch element (101) during one of the two switching states. The control circuit (104) is also designed to vary the pre-control voltage during each of the switching states.