Method and device for simulating an electrical/electronic load
View Patent ↗A method for simulating an effect of at least one electrical/electronic load includes: providing a controllable power supply unit that is connected to at least one terminal of a control unit; and simulating a first current theoretically flowing through a simulated load at the at least one terminal by drawing a second current from the control unit by the controllable power supply unit or impressing a third current on the control unit by the controllable power supply unit.
1. A method for emulating an inductive load on an electronic control device using an emulation device comprising a processing device and a controllable power supply device, the controllable power supply device being configured to be operable as a current sink such that the controllable power supply device draws current from the control device and as a current source such that the controllable power supply supplies current to the control device, the method comprising:
calculating, using the processing device, a control variable for controlling the controllable power supply device based on a plurality of inductive load parameters corresponding to the inductive load being emulated, and applying the control variable to the controllable power supply device; and
operating, based on the control variable, the controllable power supply device as a current sink and as a current source, wherein operating the controllable power supply as a current sink emulates the inductive load drawing current from the control device and wherein operating the controllable power supply as a current source emulates the inductive load supplying current to the control device.
2. The method as recited in claim 1 , wherein the control device is a motor vehicle control unit.
3. The method as recited in claim 1 , wherein the operating comprises:
utilizing an auxiliary power supply unit of the controllable power supply device.
4. The method as recited in claim 1 , wherein the operating comprises:
utilizing a controllable resistor of the controllable power supply device.
5. The method as recited in claim 1 , wherein the operating comprises:
utilizing at least one of a transistor and an auxiliary power supply unit of the controllable power supply device, wherein the auxiliary power supply unit has at least one of a settable value, a selectable value and an operational sign.
6. The method of claim 1 , wherein the inductive load being emulated is a direct-current motor comprising at least one winding, and the plurality of inductive load parameters include a winding inductance L of the at least one winding, a winding resistance R of the at least one winding, a countervoltage U EMK corresponding to voltage that would be induced in the winding by electromotive force, and a star voltage U ST corresponding to voltage at an inaccessible end of the at least one winding.
7. The method of claim 6 , wherein the calculating further comprises:
subtracting, from an input voltage U PWM of the control device, by an adder of the processing device, the countervoltage U EMK , the star voltage U ST , and a voltage U R corresponding to voltage drop across a resistor with a resistance value of the winding resistance R so as to generate a voltage corresponding to voltage applied across the winding inductance L of the inductive load to be emulated; and
integrating, by an integrator of the processing device, the voltage corresponding to voltage applied across the winding inductance L over time to generate the control variable, wherein the control variable is a current;
wherein the voltage U R corresponds to application of the control variable current to a resistor with a resistance value of the winding resistance R.
8. The method of claim 7 , wherein the adder comprises an analog operational amplifier circuit.
9. The method of claim 7 , wherein the integrator comprises a multiplier circuit.
10. The method of claim 6 , wherein the plurality of inductive load parameters are supplied to the processing device via analog inputs.
11. The method of claim 6 , wherein the inductive load to be emulated by the emulation device is a three-phase direct current motor.
12. The method of claim 4 , wherein the controllable resistor is a bipolar transistor or MOSFET.
13. The method of claim 1 , wherein the calculating the control variable is further based on an input voltage of the control device, and wherein an updated input voltage of the control device is generated during the operating the controllable power supply device based on the control variable.