motor control unit
A technology for motor control and excitation of motors, applied in motor control, electromechanical devices, control systems, etc., can solve problems such as temperature rise, current limitation, and inability to effectively display motor performance
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no. 1 approach
[0069] will refer to Figure 2 to Figure 6 A motor control device according to a first embodiment of the present invention will be described.
[0070] Such as figure 2As shown, the motor control device 90 in Embodiment 1 includes a main delay arithmetic unit 1, a sensor value adder 14, an offset adder 15, a response constant determination section 2, and an offset temperature determination section as configurations related to temperature estimation 5. Incidentally, in the first embodiment, the drive control of the inverter 70 is not limited to PWM control.
[0071] Main delay arithmetic unit 1 receives current square value (I 2 ) and the time average of the integral value (ΣI 2 / Δt). Incidentally, the current square value of the current used to excite the motor may represent the current square value of the current supplied to the motor. The currents include phase currents lu, lv and lw and dq axis currents Id and Iq. The main delay arithmetic unit 1 calculates the main ...
no. 2 approach
[0100] will refer to Figure 7 to Figure 12 A motor control device according to a second embodiment of the present invention will be described.
[0101] Such as Figure 7 As shown, the motor control device 90 of the second embodiment includes a main delay arithmetic unit 41, a sensor value adder 14, an offset adder 15, a response constant determination section 2, and a motor lock determination section 6 as configurations related to temperature estimation. . The basic configuration is the same as that in the following third to sixth embodiments.
[0102] The main delay arithmetic unit 1 according to the second embodiment receives the squared value (lu 2 , lv 2 , lw 2 ), or the time average of the integral of this squared value (e.g. ΣIu 2 / Δt). The main delay arithmetic unit 1 calculates the main delay response by using the transfer function "K / (τs+1)" for the input phase current square value. In this case, K is the gain and τ is the time constant. The combination of g...
no. 3 approach
[0127] will refer to Figure 13 to Figure 18B A third embodiment of the present invention will be described.
[0128] Such as Figure 13 As shown, instead of the phase currents of the second embodiment, according to the third embodiment, the sum of the squares of the dq axis currents (Id 2 +Iq 2 ) is input to the main delay arithmetic unit 1. The main delay arithmetic unit 1 calculates the main delay response by using the transfer function "K / (τs+1)" for the integral value of the dq-axis current square value. According to the third embodiment, only the modulation pattern is input to the response constant determination section 2 . In other words, in the third embodiment, the temperatures of the upper MOS and the lower MOS are estimated not for each phase but including three phases. The gain K and time constant τ used for the main delay calculation do not depend on the sign of the q-axis current Iq and the electrical angle θ.
[0129] Such as Figure 14 As shown, the gain...
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