A rotating electrical machine control system that controls an alternating-current rotating electrical machine having two coil sets of an N phase arranged on the same stator core includes a first inverter, a second inverter, and an inverter control device that individually controls the two inverters such that currents of different phases flow through the two coil sets. The inverter control device stops the second inverter and performs switching control of the first inverter to convert electric power between a direct current and an alternating current of an N phase, or performs switching control of the two inverters to convert electric power between a direct current and alternating currents of 2N phases. Switching devices included in the first inverter have a shorter transition time between an off state and an on state and smaller switching loss than switching devices included in the second inverter.

A recharging electric generator system which generates electrical energy and recharges itself, and methods thereof. A recharging electric generator system comprises at least one inverting apparatus; at least one power source/storage device to start the system and store electrical energy; at least one switching device; at least one transformer unit to adjust the voltage of the electrical energy, at least one rectifying unit to convert a portion of the electrical energy from alternating current to direct current and to transfer electrical energy to recharge the at least one power source/storage device; and at least one power outlet/output terminal to distribute electrical energy for further use. A recharging electric generator system seeks to provide of renewable source of energy which could be applied to different sectors and is conducive to conditions in both developed and developing countries.

A load control device may control power delivered from a power source, such as an alternating-current (AC) power source, to at least two electrical loads, such as a lighting load and a motor load. The load control device may include multiple load control circuit, such as a dimmer circuit and a motor drive circuit, for controlling the power delivered to the lighting load and the motor load, respectively. The load control device may adjust the rotational speed of the motor load in a manner so as to minimize acoustic noise generated by the load control device and reduce the amount of time required to adjust the rotational speed of the motor load. The load control device may remain powered when one of the electrical loads (e.g., the lighting load) has been removed (e.g., electrically disconnected or uninstalled) and/or has failed in an open state (has burnt out or blown out).

An embedded permanent magnet type motor, which has one pole configured of two permanent magnets and has a plurality of poles of permanent magnets embedded in a rotor, includes a rotor whose magnet embedding holes communicate with a rotor outer periphery. The rotor has between adjacent poles a q-axis projection projecting in a direction away from a rotor rotation center. The magnet embedding holes are disposed so as to form an inverted V shape. An outer peripheral edge portion on the outer side of the permanent magnets has a curvature radius smaller than the distance from a rotation center axis to a rotor outermost peripheral portion. The outer peripheral edge portion is provided with permanent magnet positioning projections which restrain a movement of the permanent magnets toward between adjacent poles.

This invention relates to a linear type actuator unit, said actuator unit (100), including an electric motor (1) driving a linear actuator (2) of, said motor (1) having a casing (11), a stator (14,15) fixed to the casing, a rotor (13) fixed to a rotary part (10), preferably a rotary motor shaft (10), wherein said rotary part (10) is arranged to be operatively connected to a reduction gear (5) which drives the mechanical output of the actuator (2), a separate magnetic brake unit (3), said magnetic brake (3) including a rotating brake member (30,31) connected to the motor shaft (10), directly or indirectly, and a plurality of fixed brake members (32, 33), wherein said magnetic brake (3) is arranged to produce a torque that will strive to position a rotary member (10, 20) with said rotating brake member (30,31) into one or more specific angular positions in relation to the fixed brake members (32, 33), and wherein said rotating brake member (30,31) is in the form of a separate annulus (30, 31) attached to said rotary member (10, 20) arranged to brake the motor at low rotational speeds and in that the actuator unit (100) is arranged with a circuitry (101) including a short circuiting arrangement (113, 103) arranged to enable braking of the motor (1) at rotational speeds above low rotational speeds.

A motor includes a housing, a front cover, a rotating shaft, and a cooling fan. The front cover is formed with multiple air guiding fins and multiple first inlet holes. The housing is formed with multiple air intercepting fins and multiple second inlet holes. In use, one portion of the air current generated by the cooling fan can be guided by the air guiding fins to pass through the first inlet holes to enter the motor's housing. Another portion of the air current can be intercepted by the air intercepting fins to pass through the second inlet holes to enter the motor's housing. The way of dissipating heat through multiple paths allows the heat generated in the motor to be dissipated more effectively, so that heat is not easy to accumulate in the motor.

A motor includes a housing, a front cover, a rotating shaft, and a cooling fan. The front cover is formed with multiple air guiding fins and multiple first inlet holes. The housing is formed with multiple air intercepting fins and multiple second inlet holes. In use, one portion of the air current generated by the cooling fan can be guided by the air guiding fins to pass through the first inlet holes to enter the motor's housing. Another portion of the air current can be intercepted by the air intercepting fins to pass through the second inlet holes to enter the motor's housing. The way of dissipating heat through multiple paths allows the heat generated in the motor to be dissipated more effectively, so that heat is not easy to accumulate in the motor.

A motor structure for an electric wheelchair, includes a housing, a front cover, a rear cover, a rotating shaft, a rotor, a commutator sleeved on the rotating shaft and electrically connected to the rotor, and a brush power terminal fixed to the front cover and in contact with the commutator, and further including a plurality of tile-shaped magnets surrounding the rotor, a cross-section of each tile-shaped magnet is a symmetric structure about an axis thereof, each tile-shaped magnet includes an inner curved surface and an outer curved surface, and the centre of the circle corresponding to the inner curved surface and the centres of circles corresponding to the outer curved surface lie on a straight line and are distanced apart.

This invention relates to a linear type actuator unit, said actuator unit (100), including an electric motor (1) driving a linear actuator (2) of, said motor (1) having a casing (11), a stator (14,15) fixed to the casing, a rotor (13) fixed to a rotary part (10), preferably a rotary motor shaft (10), wherein said rotary part (10) is arranged to be operatively connected to a reduction gear (5) which drives the mechanical output of the actuator (2), a separate magnetic brake unit (3), said magnetic brake (3) including a rotating brake member (30,31) connected to the motor shaft (10), directly or indirectly, and a plurality of fixed brake members (32, 33), wherein said magnetic brake (3) is arranged to produce a torque that will strive to position a rotary member (10, 20) with said rotating brake member (30,31) into one or more specific angular positions in relation to the fixed brake members (32, 33), and wherein said rotating brake member (30,31) is in the form of a separate annulus (30, 31) attached to said rotary member (10, 20) arranged to brake the motor at low rotational speeds and in that the actuator unit (100) is arranged with a circuitry (101) including a short circuiting arrangement (113, 103) arranged to enable braking of the motor (1) at rotational speeds above low rotational speeds.

There is provided an electric motor suitable for a vacuum cleaner, which achieves high output and high efficiency in operation at a rotation of 30,000 rpm or more, required for a motor for a vacuum cleaner, as well as enables its life to be extended. The electric motor includes a rotor core and a commutator that are coaxially fixed to a rotating shaft, and a stator core arranged around the rotor core. The rotor core and the stator core comprises a plurality of rotor core elements and a plurality of stator core elements, each formed of a thin electromagnetic steel plate having a thickness of less than 0.3 mm, are stacked and fixed in layers. Each of the plurality of rotor core elements has a diameter including a tip of each of teeth, within a range of approximately 35 mm to 40 mm, and each of the teeth has a length in a longitudinal direction that is one-third or more of a radius of the rotor core element. At least surfaces of the respective rotor core elements, facing each other, are fixed with adhesive to form the rotor core.