On-off control device for DC electric motor

Claim 2

An ON-OFF control device for a DC electric motor comprising: a switching means for controlling a DC electric motor; a first means connected to said switching means and producing on- and off-signals to control said switching means with said on- and off-signals so as to drive said DC electric motor in either direction; a second means connected to said first means for receiving its output signals and producing on- and off-signals having a polarity which is opposite to that produced by said first means, said on- and off-signals from said second means supplied to said switching means, said second means producing on- and off-signals when said first means is changed from its on-state to off-state, said on- and off-signals from said second means having time durations related to the time interval during which said first means is in the on-state, and said second means controls said switching means so as to apply a braking signal to said DC electric motor, said second means including a differentiation circuit consisting of a capacitor, and a circuit having on- and offcharacteristics, a circuit connected to said capacitor and in which the charging current path of said capacitor differs from its discharge current path, said circuit including complementary type transistors and diodes.

Claim 3

An ON-OFF control device for a DC electric motor comprising: a switching means for controlling a DC electric motor; a first means connected to saids switching means and producing on- and off-signals to control said switching means with said on- and off-signals so as to drive said DC electric motor in either direction; a second means connected to said first means for receiving its output signals and producing on- and off-signals having a polarity which is opposite to that produced by said first means, said on- and off-signals from said second means supplied to said switching means, said second means producing on- and off-signals when said first means is changed from its on-state to off-state, said on- and off-signals from said second means having time durations related to the time interval during which said first means is in the on-state, and second second means controls said switching means so as to apply a braking signal to said DC electric motor, said second means including a differentiation circuit consisting of a capcitor, and a circuit having on- and off-characteristics, a circuit connected to said capacitor and in which the charging current path of said capacitor differs from its discharge current path, said circuit including a diode-resistor network.

Claim 4

An ON-OFF control device for a DC electric motor comprising: a switching means for controlling a DC electric motor; a first means connected to saids switching means and producing on- and off-signals to control said switching means with said on- and off-signals so as to drive said DC electric motor in either direction; a second means connected to said first means for receiving its output signals and producing on- and off-signals having a polarity which is opposite to that produced by said first means, said on- and off-signals from said second means supplied to said switching means, said second means producing on- and off-signals when said first means is changed from its on-state to off-state, said on- and off-signals from said second means having time durations related to the time interval during which said first means is in the on-state, and second second means controls said switching means so as to apply a braking signal to said DC electric motor, said second means including a differentiation circuit consisting of a capcitor, and a circuit having on- and off-characteristics, a circuit connected to said capacitor and in which the charging current path of said capacitor differs from its discharge current path, said circuit including a diode-resistor network.

Claim 5

An ON-OFF control device for a DC electric motor comprising: a switching means for controlling DC electric motor; a first means connected to said switching means and producing on- and off-signals to control said switching means with said on- and off-signals so as to drive said DC electric motor in either direction; a second means connected to said first means for receiving its output signals and producing on- and off-signals having a polarity which is opposite to that produced by said first means, said on- and off-signals from said second means supplied to said switching means, said second means producing on- and off-signals when said first means is changed from its on-state to off-state, said on- and off-signals from said second means having time durations related to the time interval during which said first means is in the on-state, and said second means controls said switching means so as to apply a braking signal to said DC electric motor, said second means including a differentiation circuit consisting of a capacitor, and a circuit having on- and off-characteristics, said circuit having on-off characteristics including an operational amplifier, a diode bridge and a power source, said diode bridge being connected between the negative input terminal and the output terminal of said operational amplifier, and an intput signal applied to the positive input terminal of said operational amplifier through said capacitor.

Claim 6

An ON-OFF control device for a DC electric motor comprising: a switching means for controlling DC electric motor; a first means connected to said switching means and producing on- and off-signals to control said switching means with said on- and off-signals so as to drive said DC electric motor in either direction; a second means connected to said first means for receiving its output signals and producing on- and off-signals having a polarity which is opposite to that produced by said first means, said on- and off-signals from said second means supplied to said switching means, said second means producing on- and off-signals when said first means is changed from its on-state to off-state, said on- and off-signals from said second means having time durations related to the time interval during which said first means is in the on-state, and said second means controls said switching means so as to apply a braking signal to said DC electric motor, said second means including a differentiation circuit consisting of a capacitor, and a circuit having on- and off-characteristics, said circuit having on-off characteristics including an operational amplifier, a diode bridge and a power source, said diode bridge being connected between the negative input terminal and the output terminal of said operational amplifier, and an intput signal applied to the positive input terminal of said operational amplifier through said capacitor.

Claim 7

An ON-OFF control device for a DC electric motor comprising: a switching means for controlling a DC electric motor; a first means connected to said switching means and producing on- and off-signals to control said switching means with said on- and off-signals so as to drive said DC electric motor in either direction; and a second means connected to said first means for receiving its output signals and producing on- and off-signals having a polarity which is opposite to that produced by said first means, said on- and off-signals from said second means supplied to said switching means, said second means producing on- and off-signals when said first means is changed from its on-state to off-state, said on- and off-signals from said second means having time durations related to the time interval during which said first means is in the on-stage; and said second means controls said switching means so as to apply a braking signal to said DC electric motor.

Claim 8

An ON-OFF control device for a DC electric motor comprising: a switching means for controlling a DC electric motor; a first means connected to said switching means and producing on- and off-signals to control said switching means with said on- and off-signals so as to drive said DC electric motor in either direction; and a second means connected to said first means for receiving its output signals and producing on- and off-signals having a polarity which is opposite to that produced by said first means, said on- and off-signals from said second means supplied to said switching means, said second means producing on- and off-signals when said first means is changed from its on-state to off-state, said on- and off-signals from said second means having time durations related to the time interval during which said first means is in the on-stage; and said second means controls said switching means so as to apply a braking signal to said DC electric motor.

Claim 9

An ON-OFF control device for a DC electric motor as claimed in claim 4 in which said second means includes a differentiation circuit consisting of a capacitor, and a circuit having on- and off-characteristics.

Claim 10

An ON-OFF control device for a DC electric motor as claimed in claim 4 in which a circuit is connected to said capacitor and in which the charging current path of said capacitor differs from its discharge current path.

Claim 11

An ON-OFF control device for a DC electric motor comprising: a switching means for controlling a DC electric motor; a transducer means connected to said DC electric motor and producing an electrical signal corresponding to the rotational angle of said DC electric motor; a first means connected between said switching means and said transducer means and producing on- and off-signals to control said switching means with said on- and off-signals so as to drive said DC electric motor in either direction; a second means connected to said first means for receiving its output signals and producing on- and off-signals with a polarity which is opposite to that produced from said first means, said on- and off-signals of said second means connected to said switching means, said second means producing on- and off-signals when said first means is changed from its on-state to off-state, said on- and off-signals from said second means having time durations related to the time interval during which said first means is in the on-stage, whereby said second means controls said switching means so as to apply a braking signal to said DC electric motor.

Claim 12

An ON-OFF control device for a DC electric motor comprising: a switching means for controlling a DC electric motor; a transducer means connected to said DC electric motor and producing an electrical signal corresponding to the rotational angle of said DC electric motor; a first means connected between said switching means and said transducer means and producing on- and off-signals to control said switching means with said on- and off-signals so as to drive said DC electric motor in either direction; a second means connected to said first means for receiving its output signals and producing on- and off-signals with a polarity which is opposite to that produced from said first means, said on- and off-signals of said second means connected to said switching means, said second means producing on- and off-signals when said first means is changed from its on-state to off-state, said on- and off-signals from said second means having time durations related to the time interval during which said first means is in the on-stage, whereby said second means controls said switching means so as to apply a braking signal to said DC electric motor.