Magnet temperature estimation device for rotating electric machine and magnet temperature estimation method for rotating electric machine
AssigneeHonda Motor Co., Ltd.
InventorsMunehiro Matsubara, Yuta Ito
Life of this patent
Estimating the term…
Abstract
A magnet temperature estimation device for a rotating electric machine includes a rotating electric machine configured with a rotor having a magnet and a stator having a coil, a coolant supply part configured to supply a coolant flowing from the stator toward the rotor, and a magnet temperature calculation part configured to calculate a temperature of the magnet using a temperature of a coolant that receives heat from the coil.
Claims13
A magnet temperature estimation device for a rotating electric machine, the magnet temperature estimation device comprising:
- a rotating electric machine configured with a rotor having a magnet and a stator having a coil;
- a coolant supply part configured to supply a coolant flowing from the stator toward the rotor;
- and
- a magnet temperature calculation part configured to calculate a temperature of the magnet using a temperature of the coolant that has received heat from the coil,
- wherein the magnet temperature calculation part
- calculates a heat resistance of at least a portion between the magnet and the coolant that has received heat from the coil,
- calculates a heat reduction amount from the magnet using the heat resistance and a temperature of the coolant that has received heat from the coil, and
- calculates the temperature of the magnet using the heat reduction amount from the magnet, and
- wherein the magnet temperature estimation device controls the operation of the rotating electric machine based on the calculated temperature of the magnet.
A magnet temperature estimation method for a rotating electric machine performed by a control device with respect to:
- a rotating electric machine configured with a rotor having a magnet and a stator having a coil, and
- a coolant supply part configured to supply a coolant flowing from the stator toward the rotor,
- the magnet temperature estimation method for a rotating electric machine comprising:
- calculating a temperature of the magnet using a temperature of a coolant that has received heat from the coil,
- wherein the calculating the temperature of the magnet includes
- calculating a heat resistance of at least a portion between the magnet and the coolant that has received heat from the coil,
- calculating a heat reduction amount from the magnet using the heat resistance and a temperature of the coolant that has received heat from the coil, and
- calculating the temperature of the magnet using the heat reduction amount from the magnet, and
- controlling the operation of the rotating electric machine based on the calculated temperature of the magnet.
A magnet temperature estimation device for a rotating electric machine, the magnet temperature estimation device comprising:
- a rotating electric machine configured with a rotor having a magnet and a stator having a coil;
- a coolant supply part configured to supply a coolant flowing from the stator toward the rotor;
- a magnet temperature calculation part configured to calculate a temperature of the magnet using a temperature of the coolant that has received heat from the coil;
- and
- a coolant temperature calculation part configured to calculate the temperature of the coolant that has received heat from the coil,
- wherein the coolant temperature calculation part
- acquires a heat receiving amount of the coolant that has received heat from the coil and a heat capacity of the coolant in accordance with the flow rate of the coolant, and
- calculates the temperature of the coolant that has received heat from the coil using the heat receiving amount of the coolant that has received heat from the coil and the heat capacity of the coolant, and
- wherein the magnet temperature estimation device controls the operation of the rotating electric machine based on the calculated temperature of the magnet.
Dependencies are inferred from the claim text.