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US 7,622,887 B2Granted
Power electronics equipments
AssigneeFuji Electric Device Technology Co., Ltd.
InventorHiroyuki Yoshimura
Life of this patent
Estimating the term…
Abstract
Power electronics equipment includes air-cored insulating transformers inserted between a control circuit grounded to a vehicle body and an upper arm biased at a high voltage, and air-cored insulating transformers between the control circuit grounded to the vehicle body and the lower arm biased at a high voltage. Each of the air-cored insulating transformers includes a primary winding and a secondary facing to each other. The power electronics equipment facilitates improving resistance against hazardous environments, suppressing the deterioration by aging, reducing the adverse effects of noise caused by external magnetic flux, and transmitting and receiving signals while insulating the low and high voltage sides electrically from each other.
Claims14
A power electronics equipment comprising:
- a pair of switching devices connected in series to each other and having one switching device working for an upper arm and the other switching device working for a lower arm, said switching devices having control terminals and being operable to make a current flowing to a load or to interrupt the current flowing to the load;
- a control circuit for generating control signals directing conduction and non-conduction of the switching devices;
- driver circuits for driving the control terminals of the respective switching devices based on the control signals;
- and
- insulating transformers disposed to correspond to the switching devices to insulate the control circuit and the driver circuits from each other, each of the insulating transformers being an air-cored insulating transformer and comprising a substrate, a primary winding, a secondary winding facing the primary winding, and an insulator layer, said primary and second windings being laminated one on the other through the insulator layer and disposed on the same substrate.
2 more elements
A power electronics equipment comprising:
- a pair of switching devices connected in series to each other and having one switching device working for an upper arm and the other switching device working for a lower arm, said switching devices having control terminals and being operable to make a current flowing to a load or to interrupt the current flowing to the load;
- a control circuit for generating control signals directing conduction and non-conduction of the switching devices;
- driver circuits for driving the control terminals of the respective switching devices based on the control signals;
- and
- insulating transformers disposed to correspond to the switching devices to insulate the control circuit and the driver circuits from each other, each of the insulating transformers comprising a primary winding and a secondary winding facing each other,
- wherein a plurality of said insulating transformers is disposed between the control circuit and each of the switching devices, and
- wherein the signals transmitted between the control circuit and the switching devices comprise control signals operable to control the respective switching devices and state signals indicating states of the respective switching devices.
4 more elements
A power electronics equipment comprising:
- a pair of switching devices connected in series to each other and having one switching device working for an upper arm and the other switching device working for a lower arm, said switching devices having control terminals and being operable to make a current flowing to a load or to interrupt the current flowing to the load;
- a control circuit for generating control signals directing conduction and non-conduction of the switching devices;
- driver circuits for driving the control terminals of the respective switching devices based on the control signals;
- insulating transformers disposed to correspond to the switching devices to insulate the control circuit and the driver circuits from each other, each of the insulating transformers comprising a primary winding and a secondary winding facing each other,
- a primary side circuit operable to make a pulse current flow through the primary windings of the insulating transformers, the pulse current corresponding to rising and falling edges of transmitted signal transmitted via the relevant insulating transformer, and
- a secondary side circuit restoring the transmitted signal based on a level of a voltage pulse generated across the secondary winding of the relevant insulating transformer.
3 more elements
A power electronics equipment comprising:
- a pair of switching devices connected in series to each other and having one switching device working for an upper arm and the other switching device working for a lower arm, said switching devices having control terminals and being operable to make a current flowing to a load or to interrupt the current flowing to the load;
- a control circuit for generating control signals directing conduction and non-conduction of the switching devices;
- driver circuits for driving the control terminals of the respective switching devices based on the control signals;
- insulating transformers disposed to correspond to the switching devices to insulate the control circuit and the driver circuits from each other, each of the insulating transformers comprising a primary winding and a secondary winding facing each other,
- a primary side circuit making a pulse current flow through the primary winding of the insulating transformer, a level of the pulse current being different corresponding to rising and falling edges of a transmitted signal transmitted via the relevant insulating transformer, and
- a secondary side circuit restoring the transmitted signal based on a level of the voltage pulse generated across the secondary winding of the relevant insulating transformer.
3 more elements
A power electronics equipment comprising:
- a pair of switching devices connected in series to each other and having one switching device working for an upper arm and the other switching device working for a lower arm, said switching devices having control terminals and being operable to make a current flowing to a load or to interrupt the current flowing to the load;
- a control circuit for generating control signals directing conduction and non-conduction of the switching devices;
- driver circuits for driving the control terminals of the respective switching devices based on the control signals;
- insulating transformers disposed to correspond to the switching devices to insulate the control circuit and the driver circuits from each other, each of the insulating transformers comprising a primary winding and a secondary winding facing each other,
- a primary side circuit making a pulse current flow through the primary winding of the insulating transformer, number of the pulses in a pulse current being different corresponding to rising and falling edges of the transmitted signal transmitted via the relevant insulating transformer, and
- a secondary side circuit restoring the transmitted signal based on a voltage pulse train generated across the secondary winding of the relevant insulating transformer.
3 more elements
Dependencies are inferred from the claim text.