To optimise the performance of the power module a special attention also to current path optimisation should be paid. The article presents simulation model and simulation results for various shaped metal conductor during hard switching events which occur within power module (skin effect). There is a close connection with research project.
COBISS.SI-ID: 8719700
The shape of the solenoid current, during the PWM driving, provides information about both the coil resistance and inductance properties. The coil current values and its curve shape is also used in the algorithm which adopts the target driving current for optimal operation with minimal thermal losses. In the paper a method for solenoid current measurement is proposed, without expensive shunt resistor, but using just a voltage drop on the driving transistor channel instead. A special technique for compensation of the current to voltage conversion non-idealities as driver transistor “ON” resistance is also discussed in paper. The content is connected to research project in the part of output power stage and its current measurement.
COBISS.SI-ID: 8387156
Solenoid type actuators are often used in automotive applications. They are most commonly used in hydraulic valves for ABS, EPS etc. Problem at such automotive systems is that battery can vary from 6V to 16V also temperature can vary from -40°C up to 150°C if mounted near the engine. Therefore, a special smart driver has to be implemented to optimize the power consumption and to be able to react when critical values of parameters are reached or errors occur. This paper presents a principle and the realization of such smart Pulse Width Modulated (PWM) signal driver with solenoid signature capturing principle. The content is connected to research project in the part of output power stage and its current measurement.
COBISS.SI-ID: 8720724