Temperature Estimation Device for Rotating Electric Machines
A technology for rotating electrical machines and refrigerant temperature, which is applied to temperature measurement in electrical machines, electromechanical devices, thermometers, etc., can solve the problems of complicated device structure, increased refrigerant pressure loss, high cost, etc., and achieves restraint of complicated device structure. , the effect of improving the accuracy
Active Publication Date: 2018-09-18
HONDA MOTOR CO LTD
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Problems solved by technology
For such a problem, for example, in the case of installing a new temperature sensor in the circulation path in order to grasp the liquid temperature of the coolant in the motor with high precision, the structure of the device may be complicated and the cost of the structure may be high. And the pressure loss of the refrigerant in the circulation path increases
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Embodiment Construction
[0067] Hereinafter, a temperature estimation device for a rotating electrical machine according to an embodiment of the present invention will be described with reference to the drawings.
[0068] The temperature estimating device 10 for a rotating electrical machine according to the present embodiment is mounted on a vehicle 1 such as a hybrid vehicle or an electric vehicle, for example. Such as figure 1 As shown, the vehicle 1 includes a drive motor (M) 11 , a generator motor (G) 12 , a transmission (T / M) 13 , a refrigerant circulation unit 14 , a power conversion unit 15 , a battery 16 and a control device 17 .
[0069] The drive motor 11 and the generator motor 12 are, for example, three-phase AC brushless DC motors or the like. The driving motor 11 and the generating motor 12 each have a rotating shaft connected to a transmission 13 . The rotating shaft of the power generating motor 12 is connected to a mechanical pump 14 c of the refrigerant circulation unit 14 describ...
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The present invention provides a temperature estimating device for a rotating electrical machine capable of improving the temperature estimation accuracy of a predetermined part of a rotating electrical machine cooled by a refrigerant while preventing the complexity of the device structure. A temperature estimating device (10) for a rotating electrical machine includes a cooler (14b), a heat dissipation acquisition unit, a refrigerant temperature calculation unit, and a component temperature calculation unit (53). The heat radiation amount acquiring unit acquires the heat radiation amount of the refrigerant in the cooler (14b) based on a physical quantity related to the velocity of the cooling air and a physical quantity related to the flow rate of the refrigerant. The refrigerant temperature calculating unit acquires the temperature of the refrigerant passing through the cooler (14b) (refrigerant temperature after passing through the cooler) based on the heat radiation amount of the refrigerant acquired by the heat radiation amount obtaining unit. A component temperature calculation unit (53) estimates the temperature of a predetermined component of the rotating electric machine that exchanges heat with the refrigerant using the refrigerant temperature acquired by the refrigerant temperature calculation unit.
Description
technical field [0001] The present invention relates to a temperature estimation device for a rotating electric machine. Background technique [0002] Conventionally, there is known a motor control device that takes the temperature of the stator coil and the liquid temperature of the coolant as inputs during motor operation, and calculates the magnet temperature using a thermal model of the coolant, the stator coil, and the rotor magnet (for example, refer to Patent Document 1). In this motor control device, a temperature sensor for detecting the liquid temperature of the coolant is provided outside the motor to detect the liquid temperature of the coolant flowing from the inside of the motor to the outside. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent No. 4572907 [0006] However, according to the motor control device of the prior art described above, the cooling liquid whose temperature rises as the motor is cooled...
Claims
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IPC IPC(8): G01K13/00G01K13/02
CPCG01K13/00G01K2205/00H02K9/19H02P29/60H02K11/25H02K2209/00H02K9/00
Inventor 塚本能人伊东悠太松原宗弘松冈裕之
Owner HONDA MOTOR CO LTD