JP2015133805A - Circuit board, circuit board formation device and circuit board formation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a parallel PAM (Pulse Amplitude Modulation) control method and a simple PAM control method by one kind of substrate.SOLUTION: A circuit board comprises: a converter circuit which includes a first wiring pattern 11a for serially connecting a first inductance L1, a first diode D1 and a second wiring pattern for serially connecting a second inductance L2 and a second diode D2, switching elements IGBT1, IGBT2 connected to the first wiring pattern 11a and the second wiring pattern 11b and a control part 12; and ground patterns GND connected by a common land. The first wiring pattern 11a and the second wiring pattern 11b are formed to have substantially the same width. The first wiring pattern 11a is divided so as to leave predetermined room and the second wiring pattern 11b is divided so as to leave predetermined room and a ground pattern GND is arranged on a region of each predetermined room left by division. The divided first wiring patterns 11a are connected with each other and the divided second wiring patterns are connected with each other by jumper lines 13a, 13b, respectively.

Description

  The present invention relates to a circuit board, a circuit board forming apparatus, and a circuit board forming method.

For example, home air conditioning equipment employs a converter circuit such as a PAM (Pulse Amplitude Modulation) control method or a partial switching PAM (simple PAM) control method in accordance with the model capacity.
In the following Patent Document 1, a comparison circuit that determines whether or not the current output from the rectifier is smaller than the reference current, a comparison circuit that determines whether or not the voltage across the smoothing capacitor is greater than the reference voltage, and these A converter power supply device having a control signal switch that is turned on and off in response to output signals from two comparison circuits is disclosed.

JP 2010-233439 A

By the way, the PAM control method is a method having a high power factor improvement effect, but the switching frequency is high, and a method that requires a large number of additional parts to suppress the decrease in efficiency due to this and the generation of electromagnetic noise. It is. On the other hand, the partial switching PAM control method is a method in which the number of short-circuit switches is reduced, the loss and heat generation due to high-frequency switching are suppressed, and the power factor is improved and the harmonic current is reduced.
Such a PAM control method and a partial switching PAM control method have conventionally required substrates because their circuit configurations are different.

  The present invention has been made in view of such circumstances, and provides a circuit board, a circuit board forming apparatus, and a circuit board forming method capable of realizing a parallel PAM method and a simple PAM method with one type of substrate. Objective.

In order to solve the above problems, the present invention employs the following means.
The present invention is a circuit board including a converter circuit applied to an inverter that drives a motor, and the converter circuit includes a first wiring pattern for connecting a first inductance and a first die auto in series. A second wiring pattern for connecting the second inductance and the second diode in series, a switching element connected to each of the first wiring pattern and the second wiring pattern, and the switching And a ground pattern grounded to a ground potential is connected by a common land, and the first wiring pattern and the second wiring pattern are formed to have substantially the same width. The first wiring pattern is divided so as to have a predetermined interval, and the second wiring pattern is divided so as to have a predetermined interval. The ground patterns are arranged in the divided regions, and the divided first wiring patterns are connected by jumper wires so as to straddle the ground pattern, and straddle the ground pattern. Provided is a circuit board in which the divided second wiring patterns are connected by jumper wires.

  According to the configuration of the present invention, the first inductance and the first diode are connected in series by the first wiring pattern, the second inductance and the second diode are connected in series by the second wiring pattern, Switching elements controlled by the control means are connected to the first wiring pattern and the second wiring pattern, respectively, thereby forming a converter circuit. The first wiring pattern and the second wiring pattern formed with substantially the same width are each divided with a predetermined interval, and a ground pattern is arranged in a region of the predetermined interval. Since the wiring patterns are connected by jumper wires, the converter circuit is conductive.

  In this way, the impedances are made uniform by making the widths of the first wiring pattern and the second wiring pattern substantially the same. In addition, even if the conductive circuit side (the first wiring pattern and the second wiring pattern) connected to the switching element of the converter circuit has a somewhat high impedance, the current attenuation is not large compared to the influence on the ground pattern side. By connecting with a jumper line, connection at the shortest distance becomes possible. Further, by configuring the ground pattern to be connected by a common land, variation in impedance received from the wiring pattern is reduced. According to the present invention, a parallel PAM is configured in which a first inductance and a first diode connected in series and a second inductance and a second diode connected in series are connected in parallel to form a PAM control system. The system can be simply configured.

  The circuit board includes a first system including the first inductance and the switching element connected to the first inductance, or the second inductance and the switching element connected to the second inductance. Of the second systems, at least one of the systems may be unmounted.

  Since either one of the systems is not mounted, the simple PAM method is used. Therefore, the parallel PAM control method and the simple PAM control method can be configured by one circuit board by appropriately selecting electronic components to be mounted.

  The present invention is a circuit board forming apparatus for a circuit board provided with a converter circuit applied to an inverter that drives a motor, for connecting a first inductance and a first die auto in series to the converter circuit. A first wiring pattern; a second wiring pattern for connecting the second inductance and the second diode in series; and switching connected to the first wiring pattern and the second wiring pattern, respectively. A ground pattern grounded to a ground potential is connected by a common land, and the first wiring pattern and the second wiring pattern have substantially the same width. And the first wiring pattern is divided so as to have a predetermined interval, and the second wiring pattern is divided so as to have a predetermined interval. The ground pattern is arranged in each of the divided regions, and the divided first wiring patterns are connected with a jumper line so as to straddle the ground pattern, so as to straddle the ground pattern, Provided is a circuit board forming apparatus for connecting the divided second wiring patterns with jumper wires.

  The present invention is a circuit board forming method of a circuit board provided with a converter circuit applied to an inverter for driving a motor, for connecting a first inductance and a first die auto in series to the converter circuit. A first wiring pattern; a second wiring pattern for connecting the second inductance and the second diode in series; and switching connected to the first wiring pattern and the second wiring pattern, respectively. A ground pattern grounded to a ground potential is connected by a common land, and the first wiring pattern and the second wiring pattern have substantially the same width. And the first wiring pattern is divided so as to have a predetermined interval, and the second wiring pattern is divided so as to have a predetermined interval. The ground pattern is arranged in each of the divided regions, and the divided first wiring patterns are connected with a jumper line so as to straddle the ground pattern, so as to straddle the ground pattern, Provided is a circuit board forming method for connecting the divided second wiring patterns with jumper wires.

  The present invention has an effect that a parallel PAM system and a simple PAM system can be realized with one type of substrate.

1 is a schematic configuration diagram of a motor drive device according to a first embodiment of the present invention. 1 is a schematic top view of a circuit board according to a first embodiment of the present invention. It is a schematic block diagram of the motor drive device which concerns on the 2nd Embodiment of this invention.

  Embodiments of a circuit board, a circuit board forming apparatus, and a circuit board forming method according to the present invention will be described below with reference to the drawings.

[First Embodiment]
The circuit board described in the present embodiment will be described by taking as an example a case where the circuit board is applied to a motor driving device that drives a compressor motor of an air conditioning facility.
FIG. 1 shows a schematic configuration of a motor drive device 1 according to the present embodiment.
The motor drive device 1 converts the voltage input from the AC power source 2 into a DC voltage of a predetermined magnitude by the converter circuit 10 and then switches the DC voltage smoothed by the smoothing capacitor 3 by the inverter circuit 4 and compresses it. A voltage is supplied to the machine motor 5. The inverter circuit 4 is controlled by a control unit (control means) 12 and a control circuit 6 using a microcomputer.

FIG. 2 is a schematic top view of the circuit board 20 showing the vicinity of the converter circuit 10 applied to the motor drive device 1 described above in an enlarged manner.
As shown in FIG. 2, the circuit board 20 includes a converter circuit 10 that converts an AC voltage from an AC power source into a DC voltage having a predetermined magnitude. Specifically, the converter circuit 10 includes a first inductance (first inductance) L1, a second inductance (second inductance) L2, a first diode (first diode) D1, and a second diode ( A second diode) D2, a first wiring pattern (first wiring pattern) 11a, a second wiring pattern (second wiring pattern) 11b, a first switching element (first switching element) IGBT1, A second switching element (second switching element) IGBT2, a ground pattern GND grounded to a ground potential, and a controller 12 that controls the first switching element IGBT1 and the second switching element IGBT2 are provided. In the present embodiment, a diode in which two diodes (first diode D1 and second diode D2) are arranged in one region is used, but the present invention is not limited to this.

The first wiring pattern 11a is a wiring pattern for connecting the first inductance L1 and the first die auto D1 in series, and the second wiring pattern 11b is a connection of the second inductance L2 and the second diode D2 in series. This is a wiring pattern.
The ground pattern GND is connected by a common land on the substrate and is connected to the ground potential. By forming the ground pattern GND on the substrate, it is possible to reduce variations in impedance received from the wiring pattern. In addition, when the ground potential becomes unstable, the influence of noise increases. However, the influence of noise can be reduced by forming a ground pattern GND on the substrate and connecting them with a common land as in this embodiment. Can do.

The first wiring pattern 11a and the second wiring pattern 11b are formed to have substantially the same width. The first wiring pattern 11a is divided to have a predetermined interval, the second wiring pattern is divided to have a predetermined interval, and the ground pattern GND is arranged in each divided region. The divided first wiring patterns 11a are connected by jumper lines 13a so as to straddle the ground pattern GND, and the divided second wiring patterns 11b are connected by jumper lines 13b so as to straddle the ground pattern GND. Is done. The first wiring patterns 11a divided at a predetermined interval and the second wiring patterns 11b divided at a predetermined interval are connected by jumper wires 13a and 13b, thereby enabling connection at the shortest distance. Yes.
By configuring the circuit board 20 in this way, it is possible to configure the parallel PAM control type converter circuit 10 that adjusts the voltage input to the inverter that drives the motor. The parallel PAM control method is effective for clearing the harmonic standards where the model capacity of the air conditioning equipment is 5.0 [kW] or more.

Below, the case where the circuit board 20 which concerns on this embodiment is formed with a circuit board formation apparatus is demonstrated.
In the base material serving as a base, the converter circuit 10 includes a first inductance L1, a second inductance L2, a first diode D1, a second diode D2, a first switching element IGBT1, and a second switching element IGBT2. Is done.
The ground pattern GND grounded to the ground potential intersects the path connecting the first inductance L1 and the first diode D1 and intersects the path connecting the second inductance L2 and the second diode D2. Are arranged as follows.

  The first wiring pattern 11a and the second wiring pattern 11b having substantially the same width (for example, the thickness of the wiring pattern in the horizontal direction in the drawing in FIG. 2) are arranged. At this time, no wiring pattern is arranged in the ground pattern GND region on the path, and a predetermined interval corresponding to the ground pattern GND is provided (that is, the first wiring pattern 11a and the second wiring pattern 11b are divided). )Deploy.

  The first wiring pattern 11a is divided into two parts at a predetermined interval where the ground pattern GND is arranged, but the divided first wiring pattern 11a is connected by a jumper line 13a so as to straddle the ground pattern GND. The first inductance L1 and the first diode D1 are connected in series. The second wiring pattern 11b is divided into two parts at a predetermined interval where the ground pattern GND is disposed, but the divided second wiring pattern 11b is connected by a jumper line 13b so as to straddle the ground pattern GND. By doing so, the second inductance L2 and the second diode D2 are connected in series.

  The first switching element IGBT1 is connected to the first wiring pattern 11a, and the second switching element IGBT2 is connected to the second wiring pattern 11b. A control signal for controlling the first switching element IGBT1 and the second switching element IGBT2 is input from the control unit 12 to each switching element.

As described above, according to the circuit board 20, the circuit board forming apparatus, and the circuit board forming method according to the present embodiment, the first wiring pattern 11a and the second wiring pattern 11b are formed to have substantially the same width. The movement of each wiring pattern can be made uniform, and the impedance is made uniform.
The noise varies depending on the degree of current attenuation. For example, when a current of about 10 [A] flows when the PAM control method is configured as in the present embodiment, the first wiring pattern 11a. The current attenuation due to the resistance of the second wiring pattern 11b is not relatively large. Conversely, if the reference (ground potential side) fluctuates, the current attenuation increases and the influence of noise increases.

Considering this, in the present invention, the conductive circuit side (the first wiring pattern and the second wiring pattern) connected to the switching element of the converter circuit 10 has a slight impedance compared to the influence on the ground pattern GND side. Even if it is high, the attenuation of the current does not increase, so the connection is made by jumper wires 13a and 13b. Further, by connecting the divided wiring patterns with the jumper wires 13a and 13b, connection at the shortest distance becomes possible.
Further, by configuring the ground pattern GND to be connected by a common land, variation in impedance received from the first wiring pattern 11a and the second wiring pattern 11b is reduced.
By configuring the circuit board 20 as in the present embodiment, a parallel PAM control system in which an inductance and a diode connected in series are connected in parallel can be easily configured.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. The circuit board according to the present embodiment includes a first system including a first inductance L1 and a switching element IGBT1 connected to the first inductance L1, or a second inductance L2 and a switching element IGBT2 connected to the second inductance L2. It differs from the first embodiment described above in that at least one of the included second systems is not mounted. Hereinafter, with respect to the circuit board of the present embodiment, description of points that are common to the first embodiment will be omitted, and different points will be mainly described.

FIG. 3 shows a schematic configuration of the motor drive device 1 according to the present embodiment. In the present embodiment, the first system in FIG. 2 is left, and the parts used as the second system are not mounted.
That is, the converter circuit 10 ′ of FIG. 3 includes a first inductance L1, a first diode, a first switching element IGBT1, and a control unit 12. The converter circuit 10 ′ of the present embodiment is a method that allows simple PAM control.
In order to form such a circuit board by the circuit board forming apparatus, an electronic component to be unmounted (for example, in order to unmount the second system in FIG. 2, the second inductance L2 and the second switching element IGBT2). Is removed from the circuit board. That is, it is possible to easily switch to the simple PAM (partial switching) control method by removing unnecessary electronic components from the circuit board 20 used in the parallel PAM control method (first embodiment). it can.

According to the circuit board 20, the circuit board forming apparatus, and the circuit board forming method according to the present embodiment, the parallel PAM control method is provided by providing the series-connected inductance and the diode (first system and second system) in parallel. By not mounting one of the systems from the circuit board 20, a simple PAM control method can be easily formed. Note that one system that is not mounted may be either system.
Note that the simple PAM control method is generally used for air conditioning equipment having a model capacity of less than 5.0 [kW]. Whether to select the parallel PAM control method or the simple PAM control method is selected when the air conditioning equipment is introduced, depending on the model capacity of the air conditioning equipment to be introduced. Since all types of capacity of RAC (room air conditioner) can be handled with a single circuit board, cost reduction can be expected by using a common circuit board.

  The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Motor drive device 5 Compressor motor 10 Converter circuit 11a 1st wiring pattern 11b 2nd wiring pattern 13a 1st jumper line 13b 2nd jumper line 20 Circuit board L1 1st inductance L2 2nd inductance D1 1st diode D2 2nd diode IGBT1 First switching element IGBT2 Second switching element GND Ground pattern

Claims (4)

A circuit board comprising a converter circuit applied to an inverter that drives a motor,
The converter circuit is
A first wiring pattern for connecting a first inductance and a first die auto in series; a second wiring pattern for connecting a second inductance and a second diode in series; A switching element connected to each of the first wiring pattern and the second wiring pattern, and a control means for controlling the switching element,
The ground pattern grounded to the ground potential is connected by a common land,
The first wiring pattern and the second wiring pattern are formed to have substantially the same width,
The first wiring pattern is divided to have a predetermined interval, the second wiring pattern is divided to have a predetermined interval, and the ground pattern is arranged in each of the divided regions, and straddles the ground pattern. As described above, the circuit board in which the divided first wiring patterns are connected by jumper lines, and the divided second wiring patterns are connected by jumper lines so as to straddle the ground pattern.   Of the first system including the first inductance and the switching element connected to the first inductance, or the second system including the second inductance and the switching element connected to the second inductance The circuit board according to claim 1, wherein at least one of the systems is not mounted. A circuit board forming apparatus for a circuit board comprising a converter circuit applied to an inverter for driving a motor,
In the converter circuit,
A first wiring pattern for connecting a first inductance and a first die auto in series; a second wiring pattern for connecting a second inductance and a second diode in series; A switching element connected to each of the first wiring pattern and the second wiring pattern, and a control means for controlling the switching element,
Connect the ground pattern grounded to the ground potential with a common land,
The first wiring pattern and the second wiring pattern are formed to have substantially the same width,
The first wiring pattern is divided so as to be spaced apart by a predetermined interval, the second wiring pattern is divided so as to be spaced apart by a predetermined interval, the ground pattern is disposed in each of the divided regions, and the ground pattern is straddled. Thus, the divided first wiring patterns are connected by jumper lines, and the divided second wiring patterns are connected by jumper lines so as to straddle the ground pattern. A circuit board forming method for a circuit board comprising a converter circuit applied to an inverter for driving a motor,
In the converter circuit,
A first wiring pattern for connecting a first inductance and a first die auto in series; a second wiring pattern for connecting a second inductance and a second diode in series; A switching element connected to each of the first wiring pattern and the second wiring pattern, and a control means for controlling the switching element,
Connect the ground pattern grounded to the ground potential with a common land,
The first wiring pattern and the second wiring pattern are formed to have substantially the same width,
The first wiring pattern is divided so as to be spaced apart by a predetermined interval, the second wiring pattern is divided so as to be spaced apart by a predetermined interval, the ground pattern is disposed in each of the divided regions, and the ground pattern is straddled. As described above, the circuit board forming method in which the divided first wiring patterns are connected to each other by a jumper line, and the divided second wiring patterns are connected to each other by a jumper line so as to straddle the ground pattern.

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