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    • 11. 发明专利
    • CHARGING CIRCUIT
    • JPH01190220A
    • 1989-07-31
    • JP1549088
    • 1988-01-25
    • MATSUSHITA ELECTRIC WORKS LTD
    • AMAYA HIDETOSHIMAEKAWA TAKIOWASHIMI CHIKAO
    • H02J7/00
    • PURPOSE:To reduce the size and the cost of a charge circuit, by using a voltage detection control circuit as a charge control circuit and a residual cell-capacity detecting circuit. CONSTITUTION:When a changeover switch SW1 is switched to contacts a1-a3, a signal for turning switching element Q1 ON/OFF is produced from an oscillation control circuit 8 based on a LOW signal fed from an OUT terminal of a voltage detection control circuit 9. Output power of a secondary winding L2 is smoothed through a rectifying/smoothing circuit 6 based on the signal and charge current is fed to a cell 10. When residual capacity of the cell 10 is detected, the switch SW1 is switched to contacts b1-b3 thus discharging the cell 10 through the contact b2 and a discharge resistor R3. At this time, cell voltage is inputted through a resistor R2 to the circuit 9. When the cell voltage is higher than a predetermined level, output from the circuit 9 is brought to high level and High signal is fed to a display section 11 thus indicating that the cell capacity is higher than a predetermined level.
    • 12. 发明专利
    • CHARGING CIRCUIT
    • JPH01138930A
    • 1989-05-31
    • JP29805487
    • 1987-11-25
    • MATSUSHITA ELECTRIC WORKS LTD
    • AMAYA HIDETOSHIMAEKAWA TAKIO
    • H02J7/10
    • PURPOSE:To enable charging a storage battery having a residual capacity by detecting charged and no-load voltage variation and by performing no-load resetting of a charging control circuit. CONSTITUTION:As an output voltage V50 between terminals (b), (c), a battery voltage is outputted at ON-load, and said output voltage does not become higher than the forward voltage of the diode D2 of a no-load detection circuit and a reset circuit 7c. Therefore, a voltage proportional to the output voltage V50 is generated as a voltage V40 between battery voltage detecting elements (d), (e). On the other hand, the output voltage V50 rises at no-load to become higher than the forward voltage of said diode D2, while the voltage 40 is reduced to zero. That is, each of said no-load detection circuit and reset circuit 7c conducts detection and a transistor Q4 is turned ON, the voltage of said battery voltage detecting elements is lowered and reset. Therefore, because the voltage of the battery voltage detecting elements (d), (e) is zero and in the charged state, a charging control circuit 7a can be chargeable at no-load, when a storage battery having residual capacity is connected with said charging output terminals (b), (c).
    • 14. 发明专利
    • LINEAR MOTOR CONTROL DRIVE CIRCUIT
    • JPH10243677A
    • 1998-09-11
    • JP4124197
    • 1997-02-25
    • MATSUSHITA ELECTRIC WORKS LTD
    • IBUKI YASUOAMAYA HIDETOSHI
    • H02P25/06H02P5/00
    • PROBLEM TO BE SOLVED: To conduct control drive without receiving influence of drop of voltage of the power supply section due to pulse discharge of linear motor drive. SOLUTION: This circuit is composed of a drive circuit 6 for operating a linear motor by supplying a driven pulse current to a linear motor, a control circuit 5 for controlling the drive circuit 6, a power supply section for supplying the power source to the driven circuit 5 and control circuit 6, a switching means 3 arranged between the power supply section and control circuit 5 to turn on and off the connection between the control circuit and power supply section in synchronization with the drive pulse current and a capacitor C which is charged when the switching means 3 is ON or is discharged when it is OFF to supply the power source to the control circuit 2. When the voltage of the power supply is lowered due to the pulse discharge, the control circuit 5 is isolated from the power supply section and is simultaneously fed from the capacitor C.
    • 19. 发明专利
    • CHARGE CONTROL CIRCUIT
    • JPH05153736A
    • 1993-06-18
    • JP30929791
    • 1991-11-25
    • MATSUSHITA ELECTRIC WORKS LTD
    • AMAYA HIDETOSHIWASHIMI CHIKAO
    • H02J7/10
    • PURPOSE:To realize accurate quick charge operation by switching to trickle charging current through a first current switching means and then switching to normal charging current through a second current switching means upon elapse of a predetermined time. CONSTITUTION:The charge control circuit comprises an initial timer 6 for measuring the time to be elapsed after start of charge operation, and a first current switching means 5 for switching a normal charge current to a trickle charge current upon detection of voltage drop within a predetermined initial time interval after start of charge operation. The charge control circuit further comprises an initial trickle timer 8 for measuring the time to be elapsed after switching, and a second current switching means 7 for switching the trickle charge current to normal charging current upon elapse of a predetermined time after switching. In other words, a predetermined charge current is switched to a trickle charge current which is subsequently switched to a normal charge current upon elapse of a predetermined time. According even if the battery is loaded or unloaded carried out accurately even if the battery is loaded or unloaded during charge operation or power supply is interrupted.
    • 20. 发明专利
    • CHARGING CIRCUIT
    • JPH04255431A
    • 1992-09-10
    • JP516291
    • 1991-01-21
    • MATSUSHITA ELECTRIC WORKS LTD
    • AMAYA HIDETOSHI
    • H02J7/02
    • PURPOSE:To switch charging current reliably by detecting voltages at a plurality of connecting terminals with which a plurality of types of batteries can be connected, comparing the magnitudes of thus detected voltages and then switching the charging current based on the comparison results. CONSTITUTION:When a battery B1 is connected between connecting terminals T1, T0, cathode voltage of a diode D1 drops and the voltage at a detecting terminal 21 drops below the voltage at a detecting terminal 22. A pack detection circuit 2 compares the magnitudes of thus detected voltage and makes a decision that the battery B1 is connected between the connecting terminals T1, T0 and then provides a charge control circuit 3 with a decision signal notifying connection of the battery BL between the connecting terminals T1, T0. The charge control circuit 3 then outputs a switching signal corresponding to the decision signal to a power supply circuit 1 which thereby produces a charging current corresponding to the type of the battery BL. According to the invention, reliability of charging circuit can be enhanced.