Calsonic Kansei Corporation

Futoshi Araki

Hideki Sunaga

Kaoru Tanaka

Eiji Takahashi

Takeshi Sekine

When a PWM signal generating unit () sets a duty D of a PWM signal based on command signals (), the PWM signal generating unit () sets a phase difference &#x3c6; between each of the PWM signals based on a relation formula of &#x3c6; (degree)=360 (degree)&#xd7;D (%)/100 (%), and generates and outputs first PWM signals () and second PWM signals () in which the duty is D (%) and the phase difference is &#x3c6; (degree). The first PWM signals () and the second PWM signals () are respectively supplied to a first load driving circuit () and a second load driving circuit () to operate a first motor fan () and a second motor fan () by a PWM control, respectively.

PWM driving apparatus

An automobile servomotor controller includes a master control unit having a master control circuit for transmitting a designation signal and a slave unit having a motor and a control circuit which controls driving of a motor by outputting an operation signal to a driving device depending upon said designation signal. The slave 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 reach a target state by detecting a present position value with a position detecting device, and a control inhibiting signal for inhibiting the feedback control is individually provided to the designation signal transmitted from the master control circuit to the non-feedback control unit.

Automobile servomotor controller

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

Driving control device for actuator

In a servomotor controller, when a comparing circuit () detects that a position of an object to be controlled has been achieved to a target position, an operation inhibiting signal generating section () supplies an operation inhibiting signal () to an operation permitting/inhibiting signal-processing section (), and obtains an operation stopped state of an H bridge-driving processing section () for controlling driving of a motor. A LIN communication processing section () receives information to a self address supplied from a superordiante device, and outputs a forced operation (recovery) request (R) in the received information. The operation state of the H bridge-driving processing section () is obtained through an operation permitting trigger signal generating section () and the operation permitting/inhibiting signal-processing section () through the H bridge-driving processing section (). The motor is accordingly driven, and the feedback control based on the difference between the target position and the present position is restarted.

Servomotor controller

Electrical circuits ()-() and exclusive ICs ()-() which are for data communication are respectively included inside of a housing of actuator side connectors (')-(&#x2032;) of a harness assembly () which connects an A/C amplifier unit () and actuators (), () and (), and the actuator side connectors (&#x2032;)-(&#x2032;) are formed in a configuration possible to be connected to connectors ()-() of the actuators ()-() which are used in a door control apparatus which is designed not to carry out the data communication.

Control apparatus of air conditioning system

A control device for a brushless motor comprises a first section which stores a data table provided to minimize a difference between an actual rotation speed of the motor and a target rotation speed of the same. The difference is inevitably produced when the motor is rotated. The data table provides a plurality of rotation speed ranges each having data for a rotation speed of the motor. The control device further comprises a second section which compares the target rotation speed and the data table to select data which corresponds to the rotation speed range to which the target rotation speed belongs. The control device further comprises a third section which corrects the target rotation speed based on the selected data and drives the brushless motor in accordance with the corrected target rotation speed.

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Tokyo, Japan

Futoshi Araki