Dc-to-dc converter

Claim 2

In a DC-to-DC converter having the input and output sides insulated from one another and comprising a DC power source, an electronic power converting circuit, a control circuit for controlling said electronic power converting circuit, an electronic power supply circuit for said control circuit for starting the electronic power converting circuit and a load, the electronic power supply circuit for the control circuit comprising a. a first means comprising a reactor having the primary and secondary windings, said primary winding being connected in series with one of power lines on the input side of the power converter, and said secondary winding being adapted to take out an energy in response to a rush current at the time of the application of a DC input from the power source, and b. a second means comprising a condenser connected with the secondary winding of said reactor so as to store said energy and to feed the energy to the control circuit and a means of taking a part out of the output of the electronic power converting circuit and feeding said partial output continuously to said condenser and the electronic power converting circuit comprising a transformer having primary, secondary and tertiary windings, said tertiary winding being connected at both ends through a rectifier to the positive terminal of said condenser, and the neutral point of said tertiary winding being connected to the negative terminal of said condenser.

Claim 3

In a DC-to-DC converter having the input and output sides insulated from one another and comprising a DC power souRce, an electronic power converting circuit, a control circuit for controlling said electronic power converting circuit, an electronic power supply circuit for said control circuit for starting the electronic power converting circuit and a load, the electronic power supply circuit for the control circuit comprising a. a first means comprising a reactor having the primary and secondary windings, said primary winding being connected in series with one of power lines on the input side of the power converter, and said secondary winding being adapted to take out an energy in response to a rush current at the time of the application of a DC input from the power source, and b. a second means comprising a condenser connected with the secondary winding of said reactor so as to store said energy and to feed the energy to the control circuit and a means of taking a part out of the output of the electronic power converting circuit and feeding said partial output continuously to said condenser, said electronic power converting circuit comprises a transformer having primary, secondary and tertiary windings, said tertiary winding being connected at one end through a rectifier to the positive terminal of said condenser and at the other end to the negative terminal of said condenser.

Claim 4

In a DC-to-DC converter having the input and output sides insulated from one another and comprising a DC power souRce, an electronic power converting circuit, a control circuit for controlling said electronic power converting circuit, an electronic power supply circuit for said control circuit for starting the electronic power converting circuit and a load, the electronic power supply circuit for the control circuit comprising a. a first means comprising a reactor having the primary and secondary windings, said primary winding being connected in series with one of power lines on the input side of the power converter, and said secondary winding being adapted to take out an energy in response to a rush current at the time of the application of a DC input from the power source, and b. a second means comprising a condenser connected with the secondary winding of said reactor so as to store said energy and to feed the energy to the control circuit and a means of taking a part out of the output of the electronic power converting circuit and feeding said partial output continuously to said condenser, said electronic power converting circuit comprises a transformer having primary, secondary and tertiary windings, said tertiary winding being connected at one end through a rectifier to the positive terminal of said condenser and at the other end to the negative terminal of said condenser.

Claim 5

A DC-to-DC converter comprising a. a DC power source, b. a circuit breaker connected with said power source, c. a reactor having the primary and secondary windings, said primary winding being connected at one end with one of power lines from said circuit breaker, d. a first condenser connected between the other end of said primary winding of the reactor and the other one of the power lines from the circuit breaker, e. an electronic power converting circuit connected on the input side with both ends of said first condenser, said power converting circuit including a transformer having the primary, secondary and tertiary windings insulated from one another and a first filter, said primary winding being connected at both ends respectively through a switching element with one end of said first condenser and at the neutral point with the other end of said first condenser, and said secondary winding of the transformer being connected at both ends respectively through a rectifier with the plus side of said first filter and at the neutral point with the minus side of the first filter, f. a second condenser connected on the plus side with both ends of the secondary winding of the reactor respectively through a rectifier, said secondary winding being connected at the neutral point with the minus side of said second condenser, and said tertiary winding of the transformer in the power converting circuit being connected at both ends respectively through a rectifier with the plus side of the second condenser and at the neutral point with the minus side of the second condenser, and g. a control circuit connected to both ends of said second condenser through a second filter, said control circuit comprising an oscillator generating pulses of a fixed frequency, an error detecting and amplifying circuit for comparing the output voltage from the power converting circuit with a reference voltage and detecting and amplifying the differential voltage, and a drive circuit for providing a control signal to said switching elements in the power converting circuit in response to signals from said oscillator and error detecting and amplifying circuit.

Claim 6

A DC-to-DC converter comprising a. a DC power source, b. a circuit breaker connected with said power source, c. a reactor having the primary and secondary windings, said primary winding being connected at one end with one of power lines from said circuit breaker, d. a first condenser connected between the other end of said primary winding of the reactor and the other one of the power lines from the circuit breaker, e. an electronic power converting circuit connected on the input side with both ends of said first condenser, said power converting circuit including a transformer having the primary, secondary and tertiary windings insulated from one another and a first filter, said primary winding being connected at both ends respectively through a switching element with one end of said first condenser and at the neutral point with the other end of said first condenser, and said secondary winding of the transformer being connected at both ends respectively through a rectifier with the plus side of said first filter and at the neutral point with the minus side of the first filter, f. a second condenser connected on the plus side with both ends of the secondary winding of the reactor respectively through a rectifier, said secondary winding being connected at the neutral point with the minus side of said second condenser, and said tertiary winding of the transformer in the power converting circuit being connected at both ends respectively through a rectifier with the plus side of the second condenser and at the neutral point with the minus side of the second condenser, and g. a control circuit connected to both ends of said second condenser through a second filter, said control circuit comprising an oscillator generating pulses of a fixed frequency, an error detecting and amplifying circuit for comparing the output voltage from the power converting circuit with a reference voltage and detecting and amplifying the differential voltage, and a drive circuit for providing a control signal to said switching elements in the power converting circuit in response to signals from said oscillator and error detecting and amplifying circuit.

Claim 7

A DC-to-DC converter comprising a. a DC power source, b. a circuit breaker connected with said power source, c. a reactor having the primary and secondary windings, said primary winding being connected at one end with one of power lines from said circcuit breaker, d. a first condenser connected between the other end of said primary winding of the reactor and the other one of the power lines, e. an electric power converting circuit connected on the input side with both ends of said first Condenser, said power converting circuit including a transformer having the primary, secondary and tertiary windings insulated from one another and a first filter, said primary winding being connected at both ends respectively through a switchin element with one end of said first condenser and at the neutral point with the other end of said first condenser, and said secondary winding of the transformer being connected at both ends respectively through a rectifier with the plus side of said first filter and at the neutral point with the minus side of the first filter, f. a second condenser connected on the plus side with one end of the secondary winding of the reactor through a rectifier, the other end of said secondary winding being connected at the other end with the minus side of said second condenser, and said tertiary winding of the transformer in the power converting circuit being connected at one end through a rectifier with the plus side of the second condenser and at the other end with the minus side of the second condenser, and g. a control circuit connected directly to both ends of said second condenser, said control circuit comprising an oscillator generating pulses of a fixed frequency, an error detecting and amplifying circuit for comparing the output voltage from the power converting circuit with a reference voltage and detecting and amplifying the differential voltage, and a drive circuit for providing a control signal to said switching elements in the power converting circuit in response to signals from said oscillator and error detecting and amplifying circuit.

Claim 8

A DC-to-DC converter comprising a. a DC power source, b. a circuit breaker connected with said power source, c. a reactor having the primary and secondary windings, said primary winding being connected at one end with one of power lines from said circcuit breaker, d. a first condenser connected between the other end of said primary winding of the reactor and the other one of the power lines, e. an electric power converting circuit connected on the input side with both ends of said first Condenser, said power converting circuit including a transformer having the primary, secondary and tertiary windings insulated from one another and a first filter, said primary winding being connected at both ends respectively through a switchin element with one end of said first condenser and at the neutral point with the other end of said first condenser, and said secondary winding of the transformer being connected at both ends respectively through a rectifier with the plus side of said first filter and at the neutral point with the minus side of the first filter, f. a second condenser connected on the plus side with one end of the secondary winding of the reactor through a rectifier, the other end of said secondary winding being connected at the other end with the minus side of said second condenser, and said tertiary winding of the transformer in the power converting circuit being connected at one end through a rectifier with the plus side of the second condenser and at the other end with the minus side of the second condenser, and g. a control circuit connected directly to both ends of said second condenser, said control circuit comprising an oscillator generating pulses of a fixed frequency, an error detecting and amplifying circuit for comparing the output voltage from the power converting circuit with a reference voltage and detecting and amplifying the differential voltage, and a drive circuit for providing a control signal to said switching elements in the power converting circuit in response to signals from said oscillator and error detecting and amplifying circuit.