Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Mitsubshiki Denki Kabsuhiki Kaisha

Tatsuki Kouwa

Keiichi Komurasaki

Hirofumi Watanabe

Shiro Iwatani

Shirou Iwatani

Katsunori Tanaka

Katsuyuki Sumimoto

Katsuhiro Sasaki

Keisuke Katsurada

Yoshihito Itou

When electric generators operate in parallel, field current control operations thereof are synchronized thereby to equalize load balance therebetween. A first power generation control device connected to a main electric generator and a second power generation control device connected to a subordinate electric generator are each provided with an external sensing terminal that detects an external voltage of each electric generator to which itself belongs, an output sensing terminal that detects a power generation voltage generated by each electric generator itself, and the external output terminal that outputs a signal synchronized with a field current control signal for each field coil of each electric generator. When the plurality of electric generators are caused to drive at the same time, the external output terminal of the first power generation control device and the external sensing terminal of the second power generation control device are connected to each other.

Power generation control apparatus

Power-generation control operation for an in-vehicle electric generator is further stabilized in such a way that, in the case where a signal at an external-control-signal input terminal changes, a function of on/off-controlling a magnetic-field current in a constant cycle is interrupted. In a control apparatus, for an in-vehicle electric generator, that has a function of adjusting a generation voltage to a predetermined voltage, by on/off-controlling a magnetic-field current in a constant cycle, and variably controlling an adjustment voltage, based on an input signal from an external control unit, in the case where a signal at an external-control-signal input terminal is fixed for a long time, the function of on/off-controlling the magnetic-field current in the constant cycle is activated, and in the case where the signal at the external-control-signal input terminal changes, the function of on/off-controlling the magnetic-field current in the constant cycle is interrupted.

Control apparatus for in-vehicle AC generator

Provided is an on-vehicle power generation controller capable of uniformly maintaining balance of electric power generated by a plurality of generators, and also capable of realizing a less expensive controller structure. The on-vehicle power generation controller includes a controller () which adjusts a generated voltage to a predetermined voltage by controlling turning on and off of a field current so as to control an electric power generating operation of a generator. In a case where at least two on-vehicle power generation controllers are mounted with respect to a single engine, when respective generators () corresponding to the at least two on-vehicle power generation controllers are operated at the same time, each of second and succeeding on-vehicle power generation controllers controls the electric power generating operation of each of the respective generators () based upon a field current on-off control signal output in a first on-vehicle power generation controller.

On-vehicle power generation controller

A system for controlling a vehicular generator, includes: a voltage controlling devicefor adjusting a generator output voltage of a generatorconnected to an in-vehicle batteryto a predetermined voltage, the voltage controlling deviceincluding an external voltage sensing terminal S for detecting an external voltage of the generator, and the generator output voltage being adjusted through on/off control of a field current of the generatorin accordance with the external voltage, in which an external control unitis inserted between the external voltage sensing terminal S and the batteryto cause a voltage drop. Consequently, it is possible to dispense with an exclusive input terminal for external signal, thereby enabling simple system configuration cost reduction.

System for controlling a vehicular generator

A voltage control apparatusfor a vehicle generatorhas an input terminal L for inputting the voltage of a batterythrough an ignition switchand a light emitting element (light emitting diode) connected in series with the ignition switch and driven by a low dissipation power, and starts the excitation of the rotor coilof the vehicle generatorwhen the voltage at the input terminal L exceeds a predetermined value. A resistorfor limiting the current flowing through the light emitting diodeis disposed between an elementwithin the voltage control apparatusfor driving the light emitting diodeand the input terminal L.

Voltage control apparatus for vehicle generator having a light emitting diode

A control unit of a vehicle generator is provided which is capable of instantaneously stopping power generation in a safe manner with an inexpensive system configuration without the need of interrupting a large current when a key switch is turned off. The control unit includes a vehicle generator (), a battery () adapted to be charged by an output of the vehicle generator, and a control circuit () having an on-off control switching transistor () for controlling the turning on and off of a field current of the vehicle generator. The control circuit is operable to interrupt the on-off control switching transistor () when a detected voltage of the battery () is higher than a reference voltage, and make the on-off control switching transistor () conductive thereby to control the voltage of power generation at a predetermined voltage when the detected voltage of the battery () is below the reference voltage. A power generation stop circuit () is provided which has an off detection circuit () for detecting turning off of a key switch () of a vehicle. The power generation stop circuit () is operable to stop the power generation of the vehicle generator () when the off detection circuit () detects the turning off of the vehicle key switch (). A power generation stop terminal (K) is connected with a control terminal of the on-off control switching transistor (). The power generation stop circuit () controls the power generation stop terminal (K) to stop the power generation of the vehicle generator () instantaneously when the off detection circuit () detects the turning off of the vehicle key switch ().

Control unit of a vehicle generator

A controller for an A.C. generator for a vehicle, includes: batteries each of which is charged with electric charges on the basis of an output of generation of electrical energy of an A.C. generator having a field coil; voltage regulating means for regulating a current, which is caused to flow through the field coil, on the basis of the detection result of a voltage developed across the terminals the batteries due to an output voltage of the A.C. generator into an fixed output value of the generation of electrical energy of the A.C. generator; and field current restricting means for detecting a current which is caused to flow through the field coil by means of a field current detecting resistor to restrict the current to a predetermined value in correspondence with the detection result, wherein the field current detecting resistor is formed as a thick film printed resistor, and wherein each of the means other than the thick film printed resistor is formed by an electronic circuit are in the form of an integrated circuit.

Automotive dynamo controller

A voltage control apparatus for a vehicle-onboard electric generator in which wirings inclusive of connectors of the motor vehicle are much simplified to allow the manufacturing cost to be reduced significantly while making the trigger signal constantly available without difficulty even when abnormality takes place in association with the charge lamp. The voltage control apparatus includes a voltage control circuit (,A) for controlling a generated voltage of a vehicle-onboard electric generator (,), an external control unit (,A) for supplying a trigger signal to the voltage control circuit (,A), and a single signal line for electrically interconnecting a first terminal of the voltage control circuit (,A) and a first port of the external control unit (,A), wherein the external control unit (,A) is so designed as to output the trigger signal to the voltage control circuit (,A) by way of the single signal line, and wherein the voltage control circuit (,A) is so designed that upon occurrence of abnormality in the vehicle-onboard electric generator (,), the voltage control circuit (,A) informs the external control unit (,A) of abnormality occurrence status through the medium of the single signal line.

Voltage control apparatus for vehicle-onboard electric generator

Controller for car AC generator

A vehicle generator controller for regulating the output voltage from a generator which charges a battery mounted on a vehicle comprises battery voltage detection means for detecting the drop of a battery voltage, a switching element for controlling the field current of the generator, gradual increase control means for gradually increasing the current generated by the generator by gradually increasing the switching element by intermittently operating the switching element when the battery voltage drops and gradual increase prohibition means for canceling the gradual increase control at the beginning of the drop of the battery voltage and gradually increases the field current after the conducting ratio of the switching element is set to 100%. With this arrangement, the vehicle generator controller suppresses a torque shock caused in response to the turn-on of an electric load as well as sufficiently suppresses the drop of a battery voltage.

Vehicle generator controller

A control device for a vehicle generator which includes a semiconductor switching element for controlling the flow of current in a field winding of a generator driven by a vehicle internal combustion engine; a control unit which outputs a control signal for turning the semiconductor switching element on and off to thereby control the output voltage of the generator; and a field current detecting element for detecting the field current. The control unit has a field current limiter which outputs the control signal, depending on the output from the field current detecting element. The field current detecting element and the field current limiter are constituted as a hybrid integrated circuit. The field current detecting element and the field current limiter have respective ground patterns coupled at a location other than the ground terminal of the hybrid integrated circuit.

Control device for a vehicle generator

A control apparatus for an onboard AC generator for a motor vehicle is capable of suppressing erroneous operation of the switching circuit due to a leakage current to thereby prevent the output voltage of the AC generator from abnormal rising. The control apparatus includes an AC generator (1) including a field winding (102), a rectifier circuit (2) for converting an output voltage of the AC generator (1) into a DC voltage, a battery (5) charged with the DC voltage, a switching circuit (3) constituted by a low-side switch for turning on/off a current flow loop extending through the field winding (102), a control unit (4) for controlling on/off-operation of the switching circuit (3) so that a voltage (VB) appearing at a charging terminal of the battery (5) matches with a predetermined voltage level, and a resistor (303) inserted between a control input terminal of the switching circuit (3) and the ground potential.

Control apparatus for onboard AC generator for motor vehicle

A control device for a vehicle A.C. generator which is used to supply a vehicle load such as a battery. The control device includes a semiconductor switching element for controlling a field current in a field winding of the generator. The control device also includes a ground pattern conductor arranged between a power source terminal connecting the semiconductor switching element and the load and a control signal input terminal for inputting a control signal to the semiconductor switching element. The ground pattern conductor is further connected to a ground terminal of the semiconductor switching element. This arrangement affords protection from short circuiting of the power source terminal and the control terminal.

Control device for a vehicle a.c. generator

An apparatus for controlling an output from an AC generator for a vehicle is provided which enables wiring from an external control unit to a voltage regulator by using only one wiring line, and which is capable of adjusting an output voltage of the AC generator to a usual value in accordance with a duty ratio of a control signal supplied from the external control unit, and linearly controlling the generator output voltage to a desired value in relation to a change in the level of the control signal. The apparatus includes a control unit connected to a battery and a variety of sensors mounted on a vehicle for generating a control signal which has a duty ratio corresponding to a sensed operating condition of the vehicle; and a voltage regulator connected to the battery and the control unit for detecting an output voltage of the battery and controlling turning on and off of a field current supplied from the battery to a field coil of the AC generator in accordance with the detected battery voltage so as to adjust an output voltage of the AC generator to a level that is determined in accordance with the duty ratio of the control signal from the external control unit.

Apparatus for controlling output of vehicular AC generator

A voltage regulator 3 for controlling the output voltage of the AC generator 1 includes two voltage dividers having junction points J1 and J2 coupled to the zener diode 306 controlling the ON/OFF of the controlling transistor 309 and the power transistor 310. The voltage level at the junction point J1 is varied by means of the short-circuiting transistor 313 in response to the output of control transistor 401. Usually, the voltage at the junction point J1 is higher than the voltage at the junction point J2, and the output voltage of the AC generator 1 is controlled on the basis of the voltage at the junction point J1 to a normal and a reduced level in accordance with the output at the target voltage change-over terminal B. When quick charging is needed, however, the control transistor 402 is turned on to ground the junction point J1, such that the output voltage of the AC generator 1 is controlled to a higher level on the basis of the voltage at the junction point J2.

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Tokyo, Japan

Tatsuki Kouwa