93 results about "Polyphase coil" patented technology

There is provided a motor including a rotor and a stator arranged outside the rotor in the radial direction. The rotor includes a rotor core, a plurality of magnets arranged at equal intervals in the circumferential direction of the rotor core and functioning as one magnetic pole, and salient poles integrated with the rotor core, each arranged between adjacent magnets and at a distance from the magnets. The salient poles function as the other magnetic pole. A stator has a stator core having a plurality of teeth extending in the radial direction of the stator and arranged at equal intervals in the circumferential direction, and multi-phase coils attached to the teeth. The plurality of salient poles are arranged to have center portions arranged at equal intervals in the circumferential direction, and each have an outer surface extending in the circumferential direction in a range of a predetermined opening angle having an axis of the rotor as a center. A first opening angle serving as an opening angle of an outer surface of a first salient pole is different from a second opening angle serving as an opening angle of an outer surface of a second salient pole.

A linear motor is provided that includes a rod-like member having a cylindrical body made of a non-magnetic material and a plurality of plate-like segment magnets accommodated in the cylindrical body such that they are stacked in a longitudinal axial direction of the cylindrical body and a coil member having a polyphase coil. The rod-like member is arranged to extend through a center bore of the coil member. The rod-like member of the linear motor comprises the cylindrical body having a substantially oval or substantially rectangular section and the plurality of segment magnets having a substantially oval or substantially rectangular plate shape that are accommodated in the cylindrical body and stacked in the axial direction of the cylindrical body. The section of the center bore of the coil member is substantially oval or substantially rectangular corresponding to the shape of the section of the rod-like member.

The invention discloses a multi-phase differential-mode and common-mode joint reactor, which consists of multiple phases of coils and a space-symmetrical multi-stem iron core, wherein the iron core is provided with a central stem; the central stem serves as a symmetric center and the other stems are distributed symmetrically in a geometric form; a part of each coil of the multi-phase reactor is wound on the central stem with the same number of turns in the same direction so as to form a common-mode part of the multi-phase reactor; and the coils are separated and each coil is wound on the other stems respectively so as to form the differential-mode part of the multi-phase reactor. The multi-phase differential-mode and common-mode joint reactor can effectively improve filtering and anti-jamming performance, and has wide application prospect.

An electric motor includes a cylindrical stator that is formed with a plurality of slots. The cylindrical stator has polyphase coils that are formed by winding a plurality of conductive wires in the slots to have polyphase, a wire bundle and an insulating tube covering the wire bundle. Each conductive wire includes a core wire and an insulator that covering the core wire. The wire bundle has a drawing portion, a connecting portion and an elongated portion that is elongated between the drawing portion and the connecting portion for increasing creepage distance between the connecting portion and the housing thereby to increase insulation resistance. The connecting portion of the wire bundle provides a neutral point of the electric motor. The elongated portion and the connecting portion of the wire bundle are covered with the insulating tube.

The invention provides a rectilinear motion linear module, and aims to solve the operation accuracy, the speed, the module size, the cost and other problems in the linear module application field. According to the technical scheme of the invention, the rectilinear motion linear module comprises a trough type steel body, a mover base capable of conducting the reciprocating motion on the trough type steel body, a mover block and a stator block. The mover block and the stator block cooperate with each other to drive the mover base to move. The inner sidewall of the trough type steel body is provided with a guide groove or a guide bump orbit along the linear direction. The mover base is arranged in the trough of the trough type steel body. The surfaces of the two sides of the mover base are provided with a guiding structure matched with the guide groove / guide bump orbit of the trough type steel body. The mover blocks comprise multi-phase coreless coil windings or multi-phase coil windings with high-permeability cores, and are arranged below the mover base. The mover blocks are connected with a motor driver to be controlled by the motor driver. The stator blocks are in the form of permanent magnets and are arranged alternately along the inner bottom surface of the trough of the trough type steel body or along the extending direction of the guide bump orbit. Gaps are reserved between the mover blocks and the stator blocks.

A rotating electric machine includes at least one multi-phase coil, at least one armature core having the at least one multi-phase coil wound thereon, and at least one rotor rotatably disposed and having a plurality of magnetic poles facing the at least one armature core. The at least one multi-phase coil has at least one coil end part protruding from the at least one armature core and surrounded by at least one magnetic circuit formed in the rotating electric machine. There are a plurality of gaps formed between the at least one armature core and the at least one rotor.

A motor having a rotor and a stator is disclosed. The rotor is a consequent-pole rotor having a rotor core, a plurality of magnets, and a plurality of salient poles. The stator includes a stator core and multiphase coils. Each coil is wound about the teeth by distributed winding, in such a manner as to wind two or more consecutive teeth in single winding. The opening degree each of salient pole opposed to the distal ends of the teeth is set greater than or equal to twice the opening angle of the distal end of each tooth.

The invention relates to a coil insertion method and a coil insertion device. In the process of embedding a polyphase coil in a stator core groove and under the state that a coil curve part protrudes from the stator core top end, the curve part is expanded towards the direction deviating a stator core axle center, and the coil at the lower part and the coil at the upper part do not conflict with each other. The coil insertion device is provided with a coil end expansion means implementing the above method. Even when a polyphase coil is inserted, a coil insertion method and a coil insertion device which can reduce the height of the coil at the end part which protruding from the stator core end face.

This invention provides a motor driving apparatus that made it possible to reduce torque ripples including those attributed to load variation of the motor and an associated method for control of motor revolution. An output stage to a multiphase DC motor is comprised of power elements to supply output voltages to multiphase coils and a predriver to supply drive voltages to the power elements. A resistor means detects a current flowing through the power elements. A supply current detector detects a voltage signal produced across the resistor means as a supply current, using a high-speed ADC and a moving average filter. An output controller generates a PWM signal with a frequency lower than the frequency of the high-speed ADC so that the current detected by the supply current detector conforms to a current signal indicating a motor revolving speed and transfers the PWM signal to the output stage.

The invention discloses a brushless motor open-phase detection device and a brushless motor open-phase detection method, which belong to the technical field of motor control. The brushless motor open-phase detection device comprises a position detection unit, a control and driving unit and a determining unit, wherein the position detection unit is used for detecting a position of a motor rotor; the control and driving unit is used for applying a driving voltage to a one-phase coil or multiphase coils of a motor according to the position of the motor rotor; and the determining unit determines whether the one-phase coil or the multiphase coils of the motor has / have an open phase according to positions of the motor rotor before and after the application of the driving voltage. The brushless motor open-phase detection method comprises the steps of: acquiring the position of the motor rotor for the first time; applying the driving voltage according to the position of the motor rotor; acquiring position of the motor rotor for the second time; and determining whether the one-phase coil or the multiphase coils of the motor has / have an open phase according to the position of the motor rotor acquired for the second time and an expected position of the motor rotor. Through the open-phase detection, the brushless motor open-phase detection device and the brushless motor open-phase detection method can reduce motor loss in the early stage, can improve reliability and safety of the motor in the using process, and prevents equipment or human life safety risk caused by problems occurred in motor operation.

A roller responds to a force applied by a user, for providing a multi-phase coil signal containing information about the force applied by the user. The roller has a magnetic rotor and a multi-phase coil member. The magnetic rotor responds to the force applied by the user, for providing a magnetic rotor force. The multi-phase coil member responds to the magnetic rotor force, for providing a multi-phase coil signal containing information about the force applied by the user. The force applied by the user may include a rotational force applied by the user to a track ball or any force applied by the user to a mouse that causes the roller to move or rotate. In this case, the multi-phase coil signal contains information about the force applied on the track ball or mouse by the user. The roller may also respond to roller driving signals, for example, from a host system or other circuitry, for rotating the roller about the main roller axis. In this case, the multi-phase coil member responds to the roller driving signals, for providing multi-phase coil driver signals. The magnetic rotor responds to the multi-phase coil driver signals, for rotating or moving the roller. The roller may be used as a part of mobile, office, factory or military equipment, such as a joystick.

A double-stator rotating electric machine includes a rotor, an outer stator having an outer multi-phase coil wound thereon, and an inner stator having an inner multi-phase coil wound thereon. Each corresponding pair of phase windings of the outer and inner multi-phase coils are formed of at least one common electric conductor wire. The electric conductor wire includes a bridging portion that bridges the corresponding pair of phase windings of the outer and inner multi-phase coils across the rotor. The bridging portion extends obliquely with respect to both radial and circumferential directions of the rotor so that radially outer and radially inner ends of the bridging portion, which are respectively connected to the corresponding pair of phase windings of the outer and inner multi-phase coils, are circumferentially offset from each other by an offset angle θ. The offset angle θ is greater than 0° and less than 180° in electrical angle.

A linear motor apparatus which drives a mover of a linear motor in a stable manner, by using only information on change of relative position, without using an absolute value sensor. The apparatus has a coil array of plural phases of coils and a magnet relatively movable to the coil array, plural drivers, at least one of which being provided for each phase, to feed a current to all the same phase coils of the coil array, a sensor for measuring a change of relative position of the magnet moved by the current to the coil array, and a controller to determine the polarity of the current applied to the same phase coils based on the change of the relative position measured by the sensor, and apply a drive current to drive the magnet in a desired direction to the same phase coils.

A method for detecting deterioration of a permanent magnet in an electric motor is characterized by peak current measuring steps and a determination step. In the first peak current measuring step, when the electric motor is started, a first pulsed voltage is applied to the multi-phase coils so as to generate magnetic flux directed in the same direction as generated by the permanent magnet and a first peak current is measured. In a second peak current measuring step, a second pulsed voltage is applied to the multi-phase coils so as to generate magnetic flux directed in the direction opposite to the direction in which magnetic flux is generated by the permanent magnet and a second peak current is measured. In a determination step, it is determined whether or not the permanent magnet is deteriorated based on the difference of the absolute value between the first and the second peak currents.

A diesel-electric drive system having a generator mechanically connected to a diesel motor on the rotor side and linked to a voltage source (intermediate) inverter on the stator side. The voltage source inverter is connected to a self-commuting pulse power converter on the generator and on the load side as well as to a brake resistor. The generator has two multiple-phase coil systems which are each electroconductively linked to a self-commuting pulse power converter on the generator side, wherein the second self-commuting pulse power converter on the generator side is switched electrically parallel to the voltage source (intermediate) circuit of the voltage source (intermediate) inverter on the generator side. At least one input phase of the first self-commuting pulse power converter on the generator side is electroconductively linked via a brake resistor to a input phase of the second self-commuting pulse power converter on the generator side.

A stator of a rotary electric machine includes a stator core and polyphase coils. The stator core has a plurality of slots. The polyphase coils are provided in the slots. Each phase of the polyphase coils has a plurality of coils formed for each pole and connected in parallel. When winding in which a coil pitch is equal to number of slots divided by number of poles is termed full-pitch winding, when winding in which a coil pitch is larger than the coil pitch of the full-pitch winding is termed long-pitch winding, and when winding in which a coil pitch is smaller than the coil pitch of the full-pitch winding is termed short-pitch winding, at least two of the coils of each phase are formed on the stator core by wave winding to alternate between the long-pitch winding and the short-pitch winding along a circumferential direction of the stator core.

An electric compressor capable of appropriately starting a motor depending on a condition of a compressing unit is provided. The electric compressor includes: an AC motor including a rotor having a permanent magnet and a stator where a multi-phase coil is wound, and driving a scroll compressor; and an inverter apparatus controlling the AC motor. The inverter apparatus includes: a switching circuit supplying the AC motor with current; and a motor control unit controlling the switching circuit. The motor control unit: measures an elapsed time from a stop to a start of the AC motor for controlling the switching circuit depending on a load on the scroll compressor; calculates a target acceleration of the rotor followed when starting the AC motor, based on the measured elapsed time; and controls the switching circuit so that the rotor is started with the target acceleration.

An electronic braking and energy recycling system associated with a direct current (DC) brushless motor, characterized in that when an electronic braking task is launched, a phase voltage occurred in an inverse mode is applied onto a motor coil corresponding thereto and a gate voltage signal with positive and negative cycles is used to control an upper-side and lower-side branches to switch as compared to each other in the system, so as to redirect a current flown through the motor back to a power source end. In this invention, a controllable inverse torsion is achieved, enabling an electrical machine to be braked smoothly and reliably when necessary. As such, a dynamic power of the motor can be recycled at a maximum rate and thus the purpose of energy recycling is achieved. In addition, no complex circuitry configuration owing to the multi-phase coils is required.

A method for detecting deterioration of a permanent magnet in an electric motor is characterized by peak current measuring steps and a determination step. In the first peak current measuring step, when the electric motor is started, a first pulsed voltage is applied to the multi-phase coils so as to generate magnetic flux directed in the same direction as generated by the permanent magnet and a first peak current is measured. In a second peak current measuring step, a second pulsed voltage is applied to the multi-phase coils so as to generate magnetic flux directed in the direction opposite to the direction in which magnetic flux is generated by the permanent magnet and a second peak current is measured. In a determination step, it is determined whether or not the permanent magnet is deteriorated based on the difference of the absolute value between the first and the second peak currents.

Quality can be assured even when a motor is downsized and used at higher voltage by introducing an interphase insulation test after the steps of providing multiple phase coils in a core and an interphase insulator between individual phase coils. A method of producing a motor comprising the first step group of providing multiple phase coils in a core and an interphase insulation sheet between individual phase coils, and the second step group of sequentially carrying out the finish-forming step of forming a coil end to a specified size, the power line caulking step of individually caulking one end of each phase coil by a terminal to form a power line, the lacing step of tying a coil end with a yarn, the interphase insulation testing step of inspecting insulation between individual phase coils, the neutral line caulking step of integrally caulking the other end of each phase coil by a terminal to form a neutral line, the general insulation testing step of inspecting insulation between a core and each phase coil, and the coil fixing step of filling gaps between individual phase coils with a filler to fix the individual phase coils.

A common mode choke includes at least two groups of multi-phase coils wound on a magnetic core for balancing differential mode inductance between the phases. The multi-phase coils in each group are series connected and concentrically wound on a respective portion of the magnetic core. Each group of multi-phase coils is non-overlapping with each other group of multi-phase coils.

The present invention provides a stator of a rotating electric machine capable of improving NV characteristics while maintaining a structure in which a coil and a stator core are integrated via insulating paper. The stator (10) of the rotating electric machine includes a stator core (13) provided with a plurality of slots (24) along a circumferential direction, coils (12) of a plurality of phasesdistributedly wound around the stator core (13) via the plurality of slots (24), and an insulating paper disposed between the slot (24) and the coil (12). The insulating paper (27) has an adhesive portion which fixes the coil to the stator core and a part of the coil of each phase is fixed to the stator core (13) by the adhesive portion (28).

A double-stator rotating electric machine includes a rotor, an outer stator having an outer multi-phase coil wound thereon, and an inner stator having an inner multi-phase coil wound thereon. Each corresponding pair of phase windings of the outer and inner multi-phase coils are formed of at least one common electric conductor wire. The electric conductor wire includes a bridging portion that bridges the corresponding pair of phase windings of the outer and inner multi-phase coils across the rotor. The bridging portion extends obliquely with respect to both radial and circumferential directions of the rotor so that radially outer and radially inner ends of the bridging portion, which are respectively connected to the corresponding pair of phase windings of the outer and inner multi-phase coils, are circumferentially offset from each other by an offset angle θ. The offset angle θ is greater than 0° and less than 180° in electrical angle.

Provided is an electric power steering device that is capable of estimating coil temperatures more accurately for a polyphase motor including multi-system motor windings, with consideration also givento a heat-transfer phenomenon between a control board and coils in addition to heat-transfer phenomena between respective phases of polyphase coils, and that is also capable of estimating coil temperatures even when there is an abnormality in one of the systems. The electric power steering device comprises: a temperature sensor that detects a board temperature of a control board; and a coil temperature estimation unit that finds, from motor currents of respective phases of a polyphase motor, coil heat-generation amounts of the respective phases and a board heat-generation amount of the control board, and that estimates coil temperatures of the respective phases from the coil heat-generation amounts, the board heat-generation amount, and the board temperature on the basis of heat-transferphenomena between the respective phases caused by temperature differences between coils of the respective phases and a heat-transfer phenomenon between the coils and the control board. In cases wherethere is an abnormality in one of the systems, the coil temperature estimation unit estimates the coil temperatures from the board temperature and values obtained by correcting the coil heat-generation amounts and the board heat-generation amount found in the normal system. The heat-transfer phenomenon is expressed by a differential equation.

The invention provides a switched reluctance motor and a control method of the switched reluctance motor. The method comprises selecting working states of power tubes, calculating the voltage vector of a power-driven circuit in each working state, dividing a plurality of working sections, sampling current signals flow through a multiphase coil and carrying out clark transformation; sampling rotating speed signals of a rotor of the switched reluctance motor and carrying out Park transformation, and obtaining direct axis current signals and quadrature axis current signals; carrying out integral proportion operation on the direct axis current signals and the quadrature axis current signals to obtain direct axis voltage signals and quadrature axis voltage signals, and carrying out Park inverse transformation on the direct axis voltage signals and the quadrature axis voltage signals; calculating the duty ratio of a pulse width modulation signal loaded on each power tube in each working section based on a volt-second vector method according to the signals after the Park inverse transformation. The switched reluctance motor is provided with a controller, and the controller controls the switched reluctance motor to operate based on the control method of the switched reluctance motor. The switched reluctance motor and the control method of the switched reluctance motor can reduce the torque pulse of the switched reluctance motor and reduces noise generated by the switched reluctance motor.

A control apparatus for a motor-generator includes a stator including multi-phase coils, a rotor, a multi-phase inverter one arm of which includes a switch element and a free-wheeling element, and a power supply connected between a neutral point of the coils and a negative electrode of the inverter. When the switch elements are driven by rectangular wave, the low-side switch element connected to the high-side switch element is subject to PWM switching control while the high-side switch element is off. When a time point, at which the high-side switch element is turned off, is defined as a base point, if α is defined as a time when switching of the low-side switch element starts, and β is defined as a time when the switching ends, β-α is 120 degrees in electrical degree or more, α is more than 0 degrees, and β is less than 180 degrees.