摘要:
An apparatus for manufacturing a laminated stator core from core pieces according to a manufacturing method has a first station, a second station and a piling unit. The first station blanks out a steel plate to form a first hole in one core piece every blanking cycle so as to partly shape a portion of the core piece by forming the first hole. The second station blanks out the plate to form a second hole in one core piece every blanking cycle so as to partly shape the portion of the core piece by forming the second hole. Further, the first station differentiates a position of the first hole in each core piece from those in the other core pieces. Therefore, the core pieces having the respective portions are produced. The piling unit piles up the core pieces in layers to manufacture the laminated stator core.
摘要:
A five-phase motor includes a stator and a movable member movable relative to the stator in a preset direction. The stator includes a stator core provided with five slots within 360 electrical degrees thereof. The five slots are arranged in the preset direction at preset first pitches. The stator includes at least one set of five-phase stator windings. The five-phase stator windings are arranged in the five slots relative to each other such that each of the five-phase stator windings is wound at a preset second pitch. The second pitch substantially corresponds to two of the first pitches.
摘要:
A motor is provided, which has a larger torque and a high power factor in lower rotation speeds and a high power factor and a field weakened characteristic in a higher rotation speed range. The motor is provided with a long-hole shaped slit arranged between a rotor magnetic pole and a further rotor magnetic pole located adjacently to the rotor magnetic pole in a circumferential direction, a permanent magnet arranged in the slit, and a non-magnetic member arranged closely to the permanent magnet in a direction of magnetic fluxes. For large torque, this configuration reduces variations in rotor field magnetic fluxes, due to torque current components. In the rotation speeds, magnetic fluxes from the permanent magnet is suppressed from causing excessive field magnetic fluxes, which balances larger torque with higher power factors and a field weakened characteristic with higher power factors.
摘要:
A torque generator includes a full-pitch winding reluctance motor provided with three-phase or more coils which are composed of full-pitch windings, and a control unit therefor. The control unit controls currents supplied to the respective phase coils such that the coil for a first phase designated among the phases is first started to be current-supplied and then the coil for a second phase designated among the phases is started to be current-supplied during the current supply to the coil for the first phase. The control unit decreases an amount of the current supplied to the first coil immediately before starting the current supply to the second coil and to reinstate the amount of the current supplied to the first coil in response to starting the current supply to the second coil.
摘要:
A motor and a control unit therefor comprise: salient rotor poles and salient stator poles, which are arranged along circumferences of phases A, B and C with an even interval therebetween; magnetic paths for passing magnetic fluxes, the paths permitting the magnetic fluxes passing through the salient rotor and stator poles of each phase to return to the rotor side; and substantially looped windings arranged between the salient stator poles of individual phases and the magnetic paths for passing magnetic fluxes, wherein currents are supplied to the windings in synchronization with the rotational position of the rotor to thereby output torque. Since the structures of the stator, the rotor and the windings are simple, productivity is enhanced, whereby high quality, small size and low cost can be realized.
摘要:
In a system, a plurality of motors are provided. Each of the plurality of motors has a plurality of phase windings. Each of the plurality of motors is rotated when a unidirectional current is supplied to each of the plurality of phase windings thereof. A motor select unit includes a plurality of selectors connected to the plurality of motors, respectively. The motor select unit selects at least one of the plurality of motors via a corresponding at least one of the selectors. A phase current supplier is connected in series to each of the plurality of selectors. The phase current supplier supplies a direct current as the unidirectional current to each of the plurality of phase windings of the selected at least one of the plurality of motors via a corresponding at least one of the selectors.
摘要:
A switched reluctance motor has a rotor and a stator. The stator has first and second stator magnetic pole groups sequentially placed in an axial direction of the rotor. First and second stator magnetic poles in each group are alternately arranged on a same circumference. The first stator magnetic poles are placed every electrical angle 2π and reversely magnetized to each other. The second stator magnetic poles are placed every electrical angle 2π and reversely magnetized to each other. The first magnetic pole is apart from the second magnetic pole by electrical angle π. Each stator magnetic pole in the first stator magnetic pole group is apart from that in the second magnetic pole group by electrical angle π/2 in the circumferential direction.
摘要:
A motor and a control unit therefor comprise: salient rotor poles and salient stator poles, which are arranged along circumferences of phases A, B and C with an even interval therebetween; magnetic paths for passing magnetic fluxes, the paths permitting the magnetic fluxes passing through the salient rotor and stator poles of each phase to return to the rotor side; and substantially looped windings arranged between the salient stator poles of individual phases and the magnetic paths for passing magnetic fluxes, wherein currents are supplied to the windings in synchronization with the rotational position of the rotor to thereby output torque. Since the structures of the stator, the rotor and the windings are simple, productivity is enhanced, whereby high quality, small size and low cost can be realized.
摘要:
A motor controller includes a power source VG for driving a motor 1, a power source VRG for regenerating energy generated in the motor 1, and a power converter for transferring energy from the power source VRG to the power source VG. Windings of the motor are connected, at their opposite ends, to the power source VG and collectors of transistors TR1 to TR3, respectively. Diodes D1 to D3 are connected to nodes of the windings and the transistors TR1-TR3 such that magnetic energy generated in the motor 1 is supplied to the power source VRG. This configuration enables the motor controller to have a reduced number of transistors for driving the windings, and the power sources to be effectively utilized. Further, the motor controller can use a discharge circuit of small power consumption type, which can reduce heat generated in the motor controller.
摘要:
A numerical control apparatus for controlling feed shafts and a spindle of good machining and so on are possible because the control state is monitored at all times and provision is made for altering control parameters in accordance with the control state. The numerical control apparatus includes a detector for detecting the control state of the feed shafts and the spindle, a calculator for calculating control parameters based on the detected operating state of the feed shafts and the spindle, and a setter for setting the calculated control parameters, thereby changing the control parameters in response to the operating state of the feed shafts and the spindle.