18 results about "Polyphase coil" patented technology

A driving apparatus to be mounted on a vehicle includes a first electric motor that includes multi-phase coils and rotates a driving wheel of the vehicle, a rotation inhibiting device that inhibits rotation of the driving wheel caused by the first electric motor, and a processor that controls an electric current to be passed through the first electric motor. The processor executes a temperature raising process to raise temperatures of the multi-phase coils of the first electric motor by passing the electric current to the multi-phase coils. The rotation inhibiting device inhibits the rotation of the driving wheel and a q-axis electric current is included in the electric current passed through the multi-phase coils in the temperature raising process.

This motor control device controls a vehicle driving motor that is driven by a power converter for performing power conversion from DC power to AC power and is provided with coils of a plurality of phases. The motor control device comprises: a coil temperature acquisition unit that acquires or estimates the temperatures of the coils of the plurality of phases; a torque restriction unit that restricts the output of the motor when the temperature of the coil of at least one phase among the coils of the plurality of phases exceeds a first threshold value; and a position control unit that controls a stop position of the rotor of the motor when the temperature of the coil exceeds a second threshold value that is a threshold value lower than the first threshold value. When the temperature of the coil exceeds the second threshold value, the position control unit controls the stop position of the rotor of the motor so that the absolute value of current flowing through the phase having said coil temperature is equal to or less than a predetermined value when the vehicle stops.

The invention provides a stator, a motor, a fan and an air conditioner. Wherein the stator comprises a stator core, the stator core comprises a stator yoke and a plurality of stator teeth, the plurality of stator teeth are arranged at intervals along the circumferential direction of the stator yoke, and any two adjacent stator teeth and the stator yoke enclose a stator slot; the plurality of stator teeth comprise a plurality of first stator teeth and two tooth groups, each tooth group comprises a second stator tooth and a third stator tooth, the two tooth groups are symmetrically arranged about a first center line, and the second stator tooth and the third stator tooth in each tooth group are symmetrically arranged about a second center line; the winding part comprises multi-phase coils, one-phase coils are wound on the first stator teeth, and at least two-phase coils are wound on the second stator teeth and the third stator teeth; the number Ns of the stator slots satisfies Ns = 3 * k + / -1, and k is a positive integer; wherein the first center line and the second center line both pass through the center of the stator core, and the first center line and the second center line are perpendicular to each other. According to the arrangement, the magnetic field generated by the stator can be symmetrically distributed when the motor works, so that the content of the generated harmonic magnetic field can be reduced, the symmetry of opposite electromotive forces can be ensured, radial electromagnetic force waves, unbalanced magnetic pulling force and torque pulsation can be reduced, the operation noise of the motor can be reduced, and the service life of the motor is prolonged. And the use performance and the market competitiveness of the motor can be improved.

This invention relates to a rotor, a generator, and a wind turbine generator set. The rotor includes: a rotor core, comprising a core body and a slotted structure disposed on the outer periphery of the core body, with a shaft hole disposed within the core body; a winding, wound around the outer periphery of the rotor core and mounted on the slotted structure, with ends protruding from both ends of the rotor core along the axial direction of the shaft hole; the winding includes multi-phase coil groups, each phase coil group including a first terminal and a second terminal; support rings are respectively disposed at both ends of the core body in the axial direction; a wiring assembly, including a star ring and lead-out terminals, with the first terminal of each phase coil group connected to the star ring, and the second terminal of each phase coil group connected to the lead-out terminal; and a support assembly connected between the wiring assembly and the support rings to support the wiring assembly. This invention can reduce the probability of rotor deformation and improve the safety and reliability of the rotor.

Disclosed is a motor including a stator and a rotor configured to rotate by electromagnetic interaction with the stator. The stator includes a stator core, a coil wound around the stator core to form a rotating magnetic field, an insulator insulating the coil from the stator core, a guide member provided on one side of the stator core to guide a withdrawal direction of one end of the coil, and a neutral terminal provided on the guide member and connected to the other end of the coil. The guide member includes a body facing the coil, an inner guide protruding axially from the body, and an outer guide protruding axially from a radially outer side of the inner guide on the body. The neutral terminal is supported by the guide member and electrically connects coil ends of multiple phases.

Motor drive device (10) for driving a motor (800) having a plurality of coil sets (80, 85), each of which is formed from coils (81, 82, 83, 86, 87, 88) having a plurality of phases, the motor drive device comprising: a plurality of inverter circuits (50, 60) provided in correspondence with the plurality of coil sets and supplying electric power to the plurality of coil sets (80, 85) by converting electric power supplied from an electric power source (15); an electric power supply on / off control circuit (20, 25) which is provided in each power supply system between the electric power source (15) and the inverter circuit (50, 60), and electrically passes or interrupts the electric power source (15) to and from the inverter circuit (50, 60); a fault detection part (71, 72) which detects a fault in the inverter circuit (50, 60) in each power supply system; a drive control part (41, 42) which stops the inverter circuit from driving the motor in a failing power supply system, the failing power supply system corresponding to the power supply system having the fault detected by the fault detecting part; and an on / off control part (31, 32) which controls the electric power supply on / off circuit of the failing power supply system to be in a regenerative current conducting state when the fault detection part (71, 72) detects the fault, the regenerative current conducting state allowing the regenerative current to flow in one direction from the inverter circuit (50, 60) to the electric power source (15), and wherein: the electrical power supply on / off circuit (20, 25) includes a series connection of at least one first on / off switch (21, 26) and at least one second on / off switch (22, 27); the first on / off switch (21, 26) is a semiconductor switching element having a parasitic diode which allows a current to flow in only one direction from the inverter circuit (50, 60) to the electric power source (15); and the second on / off switch (22, 27) is a semiconductor switching element having a parasitic diode which allows a current to flow in only one direction from the electric power source (15) to the inverter circuit (50, 60); and the on / off control part (31, 41) is adapted to control the first on / off switch (21, 26) and the second on / off switch (22, 27) independently of each other; and the on / off control part (31, 41) turns off the first on / off switch (21, 26) and turns on the second on / off switch (22, 27) in the failing power supply system when the fault detection part (71, 72) detects the fault.

Engine (50; 54; 55; 56), comprising: a field (2); and a runner (1) which is facing the field (2) and is arranged to be movable relative to the field (2), wherein the rotor (1) comprises a core back (11), several teeth (12) and several coils (13), wherein the several teeth (12) each extend from the core back (11) to the field (2) and are arranged in a direction of travel of the rotor (1) with respect to the field (2), wherein the several coils (13) are attached to the several teeth (12), wherein the multiple teeth (12) comprise at least one first tooth and at least one second tooth, wherein each of the at least one first tooth is a tooth to which only one coil of a single phase of the coils (13) is attached, wherein each of the at least one second tooth is a tooth to which coils of multiple phases of the coils (13) are attached, wherein the multiple coils (13) are each arranged such that they do not extend beyond a slot formed by adjacent teeth, wherein C sections (10) are arranged in the direction of travel, wherein the section (10) comprises N / C teeth (12), where N is the number of teeth (12) of the runner (1), wherein C is a greatest common divisor of N and the number of magnetic poles of the field (2), the magnetic poles being located in a region facing the N teeth (12), and where the number of second teeth per section of the C sections (10) is one.

A charging system has a battery, an auxiliary device driven by electric power supplied from the battery when the battery supplies the electric power, a DC voltage conversion unit which converts a DC voltage at a charging equipment side to an auxiliary device side voltage different from a battery voltage and supplies the auxiliary device side voltage to the auxiliary device, and a control unit which controls the DC voltage conversion unit. The DC voltage conversion unit includes coils of a plurality of phases, and conversion units provided for every phases. The control unit includes a phase number selection unit which determines the auxiliary device side voltage based on operation required information of the auxiliary device, determines the number of phases to be driven based on the auxiliary device side voltage, and drives the determined number of phases to supply electric power to the auxiliary device.

A motor (M) comprises: a stator core (1) having a yoke (21) and a plurality of teeth (22) provided on the inner periphery of the yoke (21); multi-phase coils (2); an insulator (3) disposed between the stator core (1) and the coils (2); power supply-side lead wires (2up, 2vp, 2wp) drawn out from one end of the coil (2) of each phase; neutral point-side lead wires (2uc, 2vc, 2wc) drawn out from the other end of the coil (2) of each phase and connected to each other; and a guide plate (4) formed of an insulating body and disposed at a position at one end of the stator core (1) in the axial direction thereof and on the side of the stator core opposite to the insulator (3). The power supply-side lead wires (2up, 2vp, 2wp) are routed to the guide plate (4), and the neutral point-side lead wires (2uc, 2vc, 2c) are routed between the guide plate (4) and the stator core (1).

To provide a stator of a rotary electric machine which can be manufactured more easily.SOLUTION: A stator of the present embodiment includes a plurality of divided cores constituting a stator core, and a multi-phase coil conductor inserted into a slot portion of the stator core, in which the coil conductor is a continuous coil in which a straight portion accommodated in the slot portion of the stator core and a crossover portion between slots in a coil end portion are alternately arranged, and the divided cores and the coil conductor are formed in an annular shape after the coil conductor is inserted into a slot portion formed by arranging the plurality of divided cores on a plane.SELECTED DRAWING: Figure 6

The invention provides a motor and an air conditioner. The motor comprises a stator, the stator comprises a stator core, the stator core comprises a stator yoke and a plurality of stator teeth, the plurality of stator teeth are arranged at intervals along the circumferential direction of the stator yoke, any two adjacent stator teeth and the stator yoke enclose a stator slot, and the plurality of stator teeth comprise a first stator tooth and a second stator tooth; the winding part comprises a plurality of phases of coils, one phase of coil is wound on the first stator teeth, and at least two phases of coils are wound on the second stator teeth; the rotor can rotate relative to the stator, and the number of pole pairs of the rotor is recorded as P; in the winding part, the total phase number of the coil is recorded as m; the number of the stator slots is recorded as Ns, and the number of the second stator teeth is recorded as Nt; wherein 2 < = Nt / GCD (Ns, P) < = 2 * m <-2 >.

A winding switching device (10) is used in an electric motor (100) having coils (32A, 32B, 32C) of multiple phases, and each coil (32A, 32B, 32C) includes a coil portion (1U, 2U, 1V, 2V, 1W, 2W). A winding switching device (10) is provided with: a switching unit (11) for switching the connection state of coil units (1U, 2U, 1V, 2V, 1W, 2W); and a control unit (13). The switching unit (11) is configured to switch between a permitted state in which the supply of power is permitted and a cut-off state in which the supply of power is cut off. The control unit (13) switches the switching unit (11) from the allowed state to the cut-off state when the rotational speed of the electric motor (100) is greater than the maximum rotational speed (Rm1) of the high-torque characteristic or greater than the maximum rotational speed (Rm2) of the high-torque characteristic, or when the output voltage of the battery (91) is equal to or less than a first voltage threshold value (Thf) of the high-torque characteristic or a second voltage threshold value (Ths) of the high-torque characteristic.

This motor control device controls a multi-phase AC motor provided with a multi-phase coil unit (70) having a plurality of multi-phase coil parts (71) each including coil parts (72) of different phases electrically connected to each other. The motor control device comprises: a current path unit (20) that forms a current path between a power supply device (11) and the multi-phase AC motor; and an AC conversion unit (50) that has a plurality of AC conversion parts (51) capable of converting a DC current of the power supply device into an AC current. The AC conversion unit is configured to be able to electrically separate one coil part from another coil part of the same phase by switching off one AC conversion switching element.

A double-face linear motor with a short primary and a segmented secondary for use in belt conveyors where rotary motors are predominantly used. The primary remains fixed and static, firmly connected to the conveyor structure and the secondary follows the belt that moves in a closed loop in a vertical plane around return drums. This motor improves the efficiency of conventional conveyor belts using rotary electric motor units in their head drums. The method includes electromagnetically moving by induction the secondary blades made of a conducting material as they pass between the active faces of the motor primary where multiphase coils are arranged. The secondary blades are fastened to the belt and moves the belt by electromagnetic forces generated in the primary. The long-segmented secondary makes a distributed linear drive because the segments formed by the blades adapt to the loop path formed by the return drum of the belts.

The invention provides a stator, a motor, a fan and an air conditioner. Wherein the stator comprises a stator core, the stator core comprises a stator yoke and a plurality of stator teeth, the plurality of stator teeth are arranged at intervals along the circumferential direction of the stator yoke, and any two adjacent stator teeth and the stator yoke enclose a stator slot; the plurality of stator teeth comprise a plurality of first stator teeth, a second stator tooth and a third stator tooth; the winding part comprises multi-phase coils, one-phase coils are wound on the first stator teeth, and at least two-phase coils are wound on the second stator teeth and the third stator teeth; the number Ns of the stator slots meets the condition that Ns = 3 * k + / -1, and k is a positive integer. The arrangement breaks through the limitation that the number of the stator slots must be integer multiples of the phase number of the coil while ensuring the use performance of the motor, so that the magnetic field generated by the stator can be distributed relatively symmetrically when the motor works, thereby reducing the content of the generated harmonic magnetic field, ensuring the symmetry of opposite electromotive forces, and improving the reliability of the motor. Radial electromagnetic force waves, unbalanced magnetic pulling force and torque pulsation can be reduced, so that the operation noise of the motor can be reduced, and the use performance and market competitiveness of the motor can be improved.

The invention provides a control circuit of a motor. The control circuit comprises a sampling circuit and a sampling control circuit. The sampling circuit comprises a signal gating circuit. The signal gating circuit comprises a plurality of phase current acquisition ports and a bus current acquisition port. The plurality of phase current acquisition ports are correspondingly connected with multi-phase coils of the motor and are respectively used for acquiring phase currents of the coils connected with the phase current acquisition ports. The bus current acquisition port is connected with a bus of the motor and is used for acquiring bus current of the motor. And the sampling control circuit is connected with the sampling circuit and is used for controlling the signal gating circuit to sequentially gate the multi-phase current and the bus current in a time-sharing manner and sampling a target signal which is output by the sampling circuit and corresponds to the current gated current. According to the invention, the size and cost of the circuit can be reduced, the complexity of control operation is reduced, and the efficiency and stability of the control circuit are improved.

To provide a charging system capable of supplying power supplied from a charging facility to an auxiliary machine with high efficiency.SOLUTION: A charging system 1 includes: a DC voltage conversion unit that converts a DC voltage on a charging facility side into a secondary voltage different from a battery voltage and supplies the secondary voltage to an auxiliary device 4; and a control unit 10 that controls the DC voltage conversion unit. The DC voltage conversion unit includes coils 32U, 32V, and 32W of a plurality of phases, and switches TH1 to TH3 and TL1 to TL3 provided for the respective phases of the plurality of phases. The control unit 10 determines a secondary voltage from operation request information of the auxiliary machine 4, determines the number of phases of the coils 32U, 32V, and 32W to be driven based on the secondary voltage, drives the determined number of phases, and supplies power to the auxiliary machine 4.SELECTED DRAWING: Figure 10

An object is to easily ensure the insulation properties of a plurality of coil ends. A multi-phase motor insulating structure is used in a multi-phase motor including a stator unit provided with a stator core and a multi-phase coil. The multi-phase motor insulating structure includes a cover part containing an insulating material. The cover part is configured to cover and hold together a plurality of coil ends of the multi-phase coil that protrudes from an end of the stator core, and defines a positional relationship between the plurality of coil ends.