Abstract: Disclosed is a canned pump comprising a housing, a rotor contained in the housing, a circuit substrate supported on the housing, semi-conductor means for power control attached to the circuit substrate, an end cover attached the housing to cover the circuit substrate, an a heat sink having heat radiating means for cooling the semi-conductor means for power control. The semi-conductor means for power control is mounted on a surface of the circuit substrate facing to the end cover. The heat sink attached to the circuit substrate to cover the semi-conductor means for power control.

Abstract: Electrical circuits (35a)-(37a) and exclusive ICs (35b)-(37b) which are for data communication are respectively included inside of a housing of actuator side connectors (22?)-(24?) of a harness assembly (30) which connects an A/C amplifier unit (16) and actuators (40), (50) and (60), and the actuator side connectors (22?)-(24?) are formed in a configuration possible to be connected to connectors (41)-(61) of the actuators (40)-(60) which are used in a door control apparatus which is designed not to carry out the data communication.

Abstract: An actuator includes a lower housing member, an upper housing member ached to the lower one, and a cover member. Inside the lower housing member are arranged a driving source, a power-transmitting mechanism configured for transmitting a driving powder of the driving source to a output shaft to which a member to be driven is to be attached, a connector having terminals projected therefrom. A partition plate is provided in the upper housing member and has an opening for exposing said terminals of the connector and adapted to define a partition chamber opened to outside. A circuit board is placed on the partition plate, and has connection terminals connected to the terminals of the connector with a solder on the partition plate. A control circuit is assembled into the circuit board for the driving source. The cover member covers the circuit board.

Abstract: An automobile servomotor controller includes a master side amplifier unit having an amplifier side control circuit for transmitting a designation signal and a slave side motor unit having an actuator side control circuit which controls driving of a motor by outputting an operation signal to a driving device depending upon said designation signal. The slave side motor unit is constructed by a same feedback control unit having a non-feedback control unit for inhibiting the operation of the motor until a target is changed by an input of a new designation signal with a target reached state and a feedback control unit for driving the motor to be reached to a target state by detecting a present value with a present value detecting device, and a control inhibiting signal for inhibiting the feedback control is individually provided to the designation signal transmitted from the amplifier side control circuit to the non-feedback control unit.

Abstract: In a servomotor controller, when a comparing circuit (70) detects that a position of an object to be controlled has been achieved to a target position, an operation inhibiting signal generating section (71) supplies an operation inhibiting signal (71a) to an operation permitting/inhibiting signal-processing section (66), and obtains an operation stopped state of an H bridge-driving processing section (67) for controlling driving of a motor. A LIN communication processing section (61) receives information to a self address supplied from a superordiante device, and outputs a forced operation (recovery) request (61R) in the received information. The operation state of the H bridge-driving processing section (67) is obtained through an operation permitting trigger signal generating section (65) and the operation permitting/inhibiting signal-processing section (66) through the H bridge-driving processing section (67).

Abstract: An apparatus for controlling motor to drive an electric motor type actuator (30A) having an electric motor (30), including a serial data communication portion (53 and 55); a reception-processing portion (61) for receiving information which is addressed to its own address and supplied from a host device (100) via the serial data communication portion (53 and 55); and means for changing electric power supplied to motor (56, 67 and 73) for changing electric power supplied to the electric motor (30) based on information for designating motor-operating condition included in the received information.

Abstract: A driving control device for an actuator comprises a driving device to drive an actuator having an electric motor (30) and a driving control device (60) to control the rotation of the electric motor (30) by controlling the driving device. The driving control device includes an H bridge circuit constructed by four switching semiconductor elements (Tr1 to Tr4), and rotates the electric motor in normal and reverse directions by turning on and turning off the switching semiconductor elements (Tr1 to Tr4). The driving control device (50) conducts to activate and to stop the electric motor (30) by applying a PWM signal to the switching semiconductor elements (Tr3 and Tr4) constructing the lower arm of the H bridge circuit (51).

Abstract: When a PWM signal generating unit (10) sets a duty D of a PWM signal based on command signals (10c), the PWM signal generating unit (10) sets a phase difference &phgr; between each of the PWM signals based on a relation formula of &phgr; (degree)=360 (degree)×D (%)/100 (%), and generates and outputs first PWM signals (10a) and second PWM signals (10b) in which the duty is D (%) and the phase difference is &phgr; (degree). The first PWM signals (10a) and the second PWM signals (10b) are respectively supplied to a first load driving circuit (21) and a second load driving circuit (22) to operate a first motor fan (3) and a second motor fan (4) by a PWM control, respectively.

Abstract: Electrical circuits (35a)-(37a) and exclusive ICs (35b)-(37b) which are for data communication are respectively included inside of a housing of actuator side connectors (22′)-(24′) of a harness assembly (30) which connects an A/C amplifier unit (16) and actuators (40), (50) and (60), and the actuator side connectors (22′)-(24′) are formed in a configuration possible to be connected to connectors (41)-(61) of the actuators (40)-(60) which are used in a door control apparatus which is designed not to carry out the data communication.

Abstract: A brushless motor for a blower fan unit has a circuit structure constituted by a drive control circuit and a fuse member. The drive control circuit supplying drive current comprises a first circuit section for eliminating surges of electric power and a second circuit section for controlling magnetic field generated by the stator. The first and second circuit sections are three-dimensionally arranged with a predetermined space therebetween. The fuse member electrically connects the first and second circuit sections. An end portion of the fuse member is welded with the first circuit section, and the other end portion of the fuse member is soldered with the second circuit section. The fuse member cuts an electrical connection between the first and second circuit sections when a temperature of solder becomes higher than a predetermined temperature.

Abstract: Disclosed is a canned pump comprising a housing, a rotor contained in the housing, a circuit substrate supported on the housing, semi-conductor means for power control attached to the circuit substrate, an end cover attached to the housing to cover the circuit substrate, and a heat sink having heat radiating means for cooling the semi-conductor means for power control.

Abstract: A brushless motor for a blower fan unit is comprised of a heat sink which has a heat radiating portion and a pair of supporting legs extending from both opposite sides of the heat radiating portion. A free end portion of each supporting leg is in contact with an electric circuit board. A pressing member has a pressing portion, a pair of positioning portions perpendicularly extending from opposite end portions of the pressing portion, and a pair of connecting portions projecting from the pair of positioning portions respectively. The connecting portions are engaged with supporting legs of the heat sink respectively. The pressing portion presses switching devices to the heat sink. The positioning portions are inserted into the through-holes of the electric circuit board respectively.

Abstract: A brushless motor includes a circuit protecting case, a holder disposed on the case, a motor shaft rotatably held by the holder, a stator disposed about the holder, a yoke fixed to the motor shaft to rotate therewith, permanent magnets held by the yoke, and a circuit substrate held in the circuit protecting case. The stator includes a plurality of coils which surround the motor shaft. The circuit substrate contains a drive circuit and a control section. The drive circuit includes a switching section which switches the current path directed to the coils of the stator. A partition wall, provided in the circuit protection case, partitions the interior of the case into a first chamber and a second chamber.

Abstract: In apparatus and method for controlling a rotation speed of a brushless motor, the rotation speed of the rotor is lowered by a predetermined gradient for the rotation speed of the rotor to be reached to a present target value of the rotation speed of the rotor when the rotor of the motor is rotating at a previous target value of the rotor of the motor previously calculated and the present target value of the rotor of the motor is lower than the previous target value thereof at which the rotor of the motor is rotating. The predetermined gradient is, for example, 100% per unit time.

Abstract: A brushless motor for a blower fan unit has a circuit structure constituted by a drive control circuit and a fuse member. The drive control circuit supplying drive current comprises a first circuit section for eliminating surges of electric power and a second circuit section for controlling magnetic field generated by the stator. The first and second circuit sections are three-dimensionally arranged with a predetermined space therebetween. The fuse member electrically connects the first and second circuit sections. An end portion of the fuse member is welded with the first circuit section, and the other end portion of the fuse member is soldered with the second circuit section. The fuse member cuts an electrical connection between the first and second circuit sections when a temperature of solder becomes higher than a predetermined temperature.

Abstract: A brushless motor for a blower fan unit is comprised of a heat sink which has a heat radiating portion and a pair of supporting legs extending from both opposite sides of the heat radiating portion. A free end portion of each supporting leg is in contact with an electric circuit board. A pressing member has a pressing portion, a pair of positioning portions perpendicularly extending from opposite end portions of the pressing portion, and a pair of connecting portions projecting from the pair of positioning portions respectively. The connecting portions are engaged with supporting legs of the heat sink respectively. The pressing portion presses switching devices to the heat sink. The positioning portions are inserted into the through-holes of the electric circuit board respectively.

Abstract: A brushless motor comprises a circuit protecting case; a holder disposed on the case; a motor shaft rotatably held by the holder; a stator disposed about the holder and including a plurality of coils which surround the motor shaft; a yoke fixed to the motor shaft to rotate therewith and covering the stator with a given space therebetween; permanent magnets held by the yoke; a circuit substrate tightly held in the circuit protecting case; a drive circuit arranged on the circuit substrate, the drive circuit including a switching section which switches the path of current directed to the coils of the stator and a control section which controls a switching timing of the switching section, the switching section including a plurality of switching elements which generate a certain heat when operated.

Abstract: A power element mounting structure for use in a brushless motor comprises a circuit board; a spring plate of metal, the spring plate being resiliently mounted, through a first mounting structure, on the circuit board keeping a given space therebetween; a plurality of power elements disposed on the spring plate to form a semi-assembled unit; a heat dissipation member of metal having a plurality of heat dissipation fins on an outer surface thereof, the heat dissipation member being mounted, through a second mounting structure, on the semi-assembled unit in such a manner that an inner surface thereof faces toward the power elements; and a plurality of spring pieces defined by the spring plate, the spring pieces being arranged to press the power elements against the inner surface of the heat dissipation member.

Abstract: In apparatus and method for controlling a rotation speed of a brushless motor, the rotation speed of the rotor is lowered by a predetermined gradient for the rotation speed of the rotor to be reached to a present target value of the rotation speed of the rotor when the rotor of the motor is rotating at a previous target value of the rotor of the motor previously calculated and the present target value of the rotor of the motor is lower than the previous target value thereof at which the rotor of the motor is rotating. The predetermined gradient is, for example, 100% per unit time.

Abstract: A brushless motor comprising a housing; a drive shaft rotatably held by the housing; a stator disposed on said housing and having a plurality of coils which are arranged to surround the drive shaft; a yoke secured to the drive shaft to rotate therewith; a plurality of magnets that are held by the yoke in a manner to surround the stator keeping a given space therebetween; an electric parts protecting case on which the housing is mounted; a drive circuit installed in the case for energizing the coils of the stator, the drive circuit including a plurality of switching elements each changing the direction of electric current flowing in the corresponding coil of the stator; a control circuit installed in the case for controlling operation of the switching elements to adjust a rotation speed of the drive shaft; electric connectors for connecting the drive and control circuits; and a heat sink held by the case, the heat sink including a hidden portion exposed to an interior of the case and a plurality of heat radiat