A method of monitoring an electrical machine, wherein the method includes: a) obtaining temperature measurement values of the temperature at a plurality of locations of the electrical machine, b) obtaining estimated temperatures at the plurality of locations given by a thermal model of the electrical machine, the thermal model including initial weight parameter values, c) minimizing a difference between the temperature measurement values and the estimated temperatures by finding optimal weight parameter values, d) storing the initial weight parameter values to thereby obtain a storage of used weight parameter values, and updating the optimal weight parameter values as new initial weight parameter values, and repeating steps a)-d) over and over during operation of the electrical machine.

A motor iron-loss calculation device calculates an iron-loss value of a motor on the basis of a primary frequency and a q-axis current component in a dq-axis rotating coordinate system having a d axis in a rotor magnetic flux direction of the motor.

Systems and methods for controlling smart motors. One smart motor system includes a control bus, an input device, and a smart motor communicatively coupled to the input device via the control bus. The smart motor includes an electronic processor configured to receive, from the input device, a command frame indicating an action, perform the action, receive, from the input device, a data request frame requesting a status of the smart motor, and transmit, to the input device and in response to receiving the data request frame, a data frame indicating the status of the smart motor.

An external force estimation device is configured to estimate an external force acting on a motor. The external force estimation device includes a processor. The processor is configured to: calculate an output torque of the motor by using a value of a current supplied to the motor; estimate an inertia torque of the motor by using rotational position information of the motor; estimate a first friction torque of the motor by using the rotational position information of the motor; perform temperature-based correction for the first friction torque by using temperature information of the motor; and estimate the external force by subtracting the inertia torque and the first friction torque after the temperature-based correction from the output torque.

A control device that controls cooling of a rotating electrical machine for driving a vehicle includes an arithmetic operation unit that executes predetermined arithmetic operation processing, and a storage unit that is accessible by the arithmetic operation unit. First temperature information from a first temperature detection unit that detects a temperature of a first refrigerant that exchanges heat with at the rotating electrical machine, second temperature information from a second temperature detection unit that detects a temperature of a second refrigerant that exchanges heat with a winding of the rotating electrical machine and is cooled by the first refrigerant, third temperature information from a rotating electrical machine temperature detection unit detects a temperature of the rotating electrical machine, and fourth temperature information from an outside air temperature detection unit are input. The second temperature information is verified by using the first, second, third, and fourth temperature information.

A control device that controls cooling of a rotating electrical machine for driving a vehicle includes an arithmetic operation unit that executes predetermined arithmetic operation processing, and a storage unit that is accessible by the arithmetic operation unit. First temperature information from a first temperature detection unit that detects a temperature of a first refrigerant that exchanges heat with at the rotating electrical machine, second temperature information from a second temperature detection unit that detects a temperature of a second refrigerant that exchanges heat with a winding of the rotating electrical machine and is cooled by the first refrigerant, third temperature information from a rotating electrical machine temperature detection unit detects a temperature of the rotating electrical machine, and fourth temperature information from an outside air temperature detection unit are input. The second temperature information is verified by using the first, second, third, and fourth temperature information.

The present disclosure relates to an electronic parking brake system including a motor actuator operated by an electric motor, wherein the electronic parking brake system further includes a motor driving circuit provided to drive the electric motor, and a controller configured to determine a temperature of the electric motor from a temperature of a brake disc during a parking operation, determine a target current based on the determined motor temperature, and control the electric motor depending on the determined target current.

The present disclosure relates to an electronic parking brake system including a motor actuator operated by an electric motor, wherein the electronic parking brake system further includes a motor driving circuit provided to drive the electric motor, and a controller configured to determine a temperature of the electric motor from a temperature of a brake disc during a parking operation, determine a target current based on the determined motor temperature, and control the electric motor depending on the determined target current.

An actuator in a HVAC system includes a motor and a drive device driven by the motor. The drive device is coupled to a movable HVAC component for driving the movable HVAC component between multiple positions. The actuator includes an input connection configured to receive an input signal and a processing circuit coupled to the motor. The processing circuit is configured to determine whether the input signal is an AC voltage signal or a DC voltage signal. The processing circuit is configured to operate the motor using an AC motor control technique in response to determining that the input signal is an AC voltage signal and configured to operate the motor using a DC motor control technique in response to determining that the input signal is a DC voltage signal.

An electric tool includes a motor, an operation part provided to be operable by a user, a motor drive control unit configured to perform control of driving the motor in response to the operation part being operated, a temperature sensor, and a temperature determination unit configured to determine overheating of the motor. The temperature determination unit is configured to estimate a temperature of the motor based on a drive situation of the motor and a detection result of the temperature sensor, and to determine the overheating of the motor based on the estimated temperature.