JP2003219680A - Dc brushless motor controller for washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that many terminals are used because rotor position detecting signals of a conventional DC brushless motor require a plurality of signal wires with the same number as that of outputs of the sensors, and because circuits that receive the signals require a plurality of input terminals. <P>SOLUTION: By making a resistor connected between a power supply for sensors and the power supply terminals of sensor circuits and resistors connected between the output of the sensor circuits and the power supply terminals of the sensor circuits generate a voltage in accordance with the output terminal voltages of the sensor circuits, and by converting the output terminal signals of the sensor circuits that indicate rotor position data into a single signal by carrying them on power supply wires, it is made possible to reduce the signal wires between the circuits that receive the single signal, input terminals and pattern areas, to simplify the patterns, to improve the easiness and reliability of the pattern design, or to cut the cost. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC brushless motor mounted on a washing machine.

[0002]

2. Description of the Related Art Conventionally, a sensor circuit for detecting a rotor position of a DC brushless motor mounted on a washing machine uses, for example, three sensors when the DC brushless motor has three phases and eight poles, as shown in FIG. An output as shown in FIG. 2 is obtained according to the rotation of the motor by the three sensor circuits of the first sensor circuit 1, the second sensor circuit 2 and the third sensor circuit 3. The normal sensor obtains a high or low output as shown in FIG. 2 by adding an electronic circuit thereto. Therefore, the sensor and its electronic circuit will be called a sensor circuit. The drive coil is determined by the timing and level of the level change of the sensor circuit output. In the present embodiment, the sensor circuit is assumed to be composed of a Hall IC that outputs the high and low signals. And that IC
The output is often configured so that the collector of the transistor is open (hereinafter referred to as open collector). Therefore, the output is obtained from the sensor circuit output terminal as a configuration in which the resistors 4, 5 and 6 are connected to the power source 7 of the sensor circuit. The outputs of the three sensor circuits are input to the microcomputer 17 and are calculated in the microcomputer. A control signal is output from the microcomputer output to the motor drive circuit 11, and the motor 12 is driven by the output of the motor drive circuit 11.

The sensor circuit is located on the first printed circuit board arranged near the rotor of the motor, and the output of the sensor circuit is transmitted to the second printed circuit board connected by the lead wire to the second printed circuit board. Therefore, it is often connected to the microcomputer 17 and the motor drive circuit. This is because the motor is attached to the washing tub, so vibration is always applied during the washing operation.If the printed circuit board on which the components are mounted is fixed to the motor, the vibration causes the weight of the components to cause a defect in the components themselves or to cause a failure. There is a problem in that a stress may occur between the soldering part of the foot of the component and the foil, so that the mounting printed circuit board may easily fail. Therefore, the mounted printed circuit board is placed in a place free from vibration so as not to be adversely affected by the vibration. And only the minimum required and lightweight sensor circuit is mounted on the printed circuit board near the rotor and directly attached to the motor. The above-mentioned configuration is adopted.

[0004]

However, according to the above-mentioned conventional method, the sensor circuit has three outputs,
To input this to the microcomputer, use 3 as the microcomputer input.
Terminals are required, and therefore, three lines are required to connect the sensor circuit output terminal and the microcomputer input terminal. For this reason, many input terminals of circuits such as microcomputers that receive sensor circuit output signals are occupied, and three lines are required to connect the printed circuit boards. Therefore, there are many terminals for the lead wires and the connectors that connect the lead wires and the printed circuit board. It had the problem of being necessary.

The present invention is to solve the above-mentioned conventional problems, and transmits rotor position information obtained at a plurality of sensor circuit output terminals using a power supply line to eliminate the signal line from the sensor circuit output terminals. By reducing and rationalizing the connection between the sensor circuit output and the circuit that receives this signal, and reducing the number of occupied input terminals of the circuit that receives the signal, and performing signal processing corresponding to this, a rational rotor position detection device It realizes realization and motor control.

[0006]

In order to solve the above-mentioned conventional problems, the washing machine of the present invention has a resistor inserted between the power source for the sensor circuit and the power source terminal of the sensor circuit, and the output terminal of the sensor circuit. And a resistance value of a different value between the sensor circuit power supply terminal, and a parallel resistance value of the different resistance value generated by a combination of high and low voltages generated by the sensor circuit output, and another different resistance value Connect resistors with different values to extract the power source terminal of the sensor circuit as a single signal as the rotor position detection output from the sensor circuit,
A control signal for direct motor control is created from a single signal obtained by superposing the plurality of sensor circuit signals.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is to provide a plurality of sensor circuits for detecting the rotor position of a DC brushless motor, a sensor power supply, power supply terminals of the plurality of sensor circuits, and the sensor. The resistance connected between the power supply for the power supply and the resistance connected between the output terminal of the sensor circuit and the power supply terminal are different from each other, and the resistance generated by the combination of the high and low voltages generated by the sensor circuit output is different. A resistor in which the parallel resistance value of the resistor and the resistance value of another different resistor have different values, an AD conversion circuit connected to the sensor circuit power supply terminal, and a plurality of sensor circuit information connected to the AD conversion circuit output are combined. It is possible to detect a plurality of sensor circuit output voltages by using a motor control device equipped with an arithmetic control unit that detects a change in the data from the generated signal and directly outputs the motor control signal. It becomes possible to take out as a single signal from the power supply terminal voltage of, and it becomes possible to directly generate a signal for controlling the motor drive circuit of the motor from the single signal by the AD conversion circuit and the arithmetic control means. It is possible to create the control signal by performing the processing of a single signal from the process to the generation of the control signal.

According to a second aspect of the present invention, a plurality of sensor circuits for detecting the rotor position of the DC brushless motor, a sensor power supply, a power supply terminal of the plurality of sensor circuits and the sensor power supply are provided. And a resistance connected between the output terminal of the sensor circuit and a power supply terminal and having a different value, and a parallel resistance of the different resistances generated by a combination of high and low voltages generated by the sensor circuit output. A resistor having a different resistance value from that of another different resistor, and an AD conversion circuit connected to the sensor circuit power supply terminal,
An arithmetic control unit that is connected to the output of the AD conversion circuit and detects a change in the data from a signal in which a plurality of sensor circuit information is combined and directly outputs a motor control signal; and a plurality of the sensor circuits and an output terminal of the sensor circuit. A first printed board on which a resistor connected between power supply terminals is mounted, a power source for the sensor, the resistor, an AD conversion circuit, a second printed board on which arithmetic control means is mounted, and a first printed board. A plurality of sensor circuit output signals by providing a motor control device that obtains a motor drive signal on the second printed circuit board by including a lead wire that connects the second printed circuit board and the second printed circuit board so that the electrical connection is made. It becomes possible to take out as a single signal from the power supply terminal of the sensor circuit, and this signal is transmitted from the first printed circuit board to the second printed circuit board and the second It can be a control signal for controlling a direct motor drive circuit by the AD conversion circuit and the arithmetic control means preparative substrate become. This allows signal transmission between printed circuit boards to be done with a single lead wire that is shared with the power supply line, and the control signal can be created by processing a single signal from sensor circuit output to control signal generation. Is possible.

The invention according to claim 3 of the present invention is AD
3. A conversion circuit and arithmetic control means are built in a microcomputer, and a motor control signal is output from a microcomputer output terminal.
By using the described motor control device, a signal for controlling the motor drive circuit of the motor can be created from the sensor circuit output signal only by software design of the microcomputer.
It becomes unnecessary to provide the D conversion circuit and the operation control means.

According to a fourth aspect of the present invention, the power supply voltage for the sensor circuit is higher than the power supply voltage of the AD conversion circuit or the microcomputer to which the power supply terminal of the sensor circuit is connected, and the power supply of the sensor circuit is set. The resistance values of the resistors and the resistors having different values are set such that the terminal voltage is equal to or higher than the operation guarantee minimum voltage of the sensor circuit and equal to or lower than the power supply voltage of the AD conversion circuit or the microcomputer.
By using the described motor control device, it is possible to widen the selection range of the resistance value and ensure the ease of design.

According to a fifth aspect of the present invention, there is provided a motor control device according to the fourth aspect, wherein a voltage conversion circuit is provided between the power supply terminal of the sensor circuit and the AD conversion circuit or the microcomputer. The upper limit of the sensor circuit power supply terminal voltage is not limited to the power supply voltage of the AD conversion circuit or the microcomputer, so that the selection range of the resistance value can be further expanded, and the ease of design can be ensured. It will be possible. Further, the power supply terminal voltage of the sensor circuit can be set in the range of 0 to the source voltage for the sensor circuit, and the voltage width between the discrete values can be widened. It becomes advantageous against noise coming in on the transmission line and can be made stronger against noise.

According to a sixth aspect of the present invention, a resistor connected between the output terminal and the power supply terminal of the sensor circuit is replaced, and a high current having a different current value and the sensor circuit output is generated. The motor control device according to any one of claims 1, 2, 3, 4, and 5, further comprising: a constant current circuit in which a current value of a sum of the different current values generated by a combination of low voltages is a value different from other current values. By doing so, it is possible to calculate the voltage of the composite signal that takes the discrete value that includes the rotor position information that appears at the power terminal of the sensor circuit as the sum of the constant current values, and design the sensor circuit power terminal voltage that takes the discrete value. Therefore, the discrete values can be easily equalized, and the power supply voltage width of the AD conversion circuit or the microcomputer that receives the sensor circuit signal can be maximized, and the voltage between the discrete values can be expanded. Since the detection level difference in the AD conversion circuit can be increased, stable level detection can be performed, and stable level detection can be performed without erroneous detection of noise superimposed on a signal. .

According to a seventh aspect of the present invention, the number of sensors is three, and the constant current value of each sensor circuit is set to 1: 2: 4. The power supply terminal voltage is equal to the voltage between the six discrete value potentials, and the power supply voltage width of the AD conversion circuit or the microcomputer can be utilized to the maximum, and the voltage between the discrete values can be expanded, and the AD conversion can be performed. Since the detection level difference in the circuit can be expanded, it is possible to perform stable level detection and also to perform stable level detection without erroneous detection of noise or the like superimposed on the signal.

According to an eighth aspect of the present invention, the number of sensors is set to 3, and a parallel resistance generating circuit is further provided to flow an additional current when two sensor circuit output terminal currents flow. By using the motor control device described in 3, 4, or 5, it is possible to increase the operating voltage range by preventing the adjacent values of the voltage having discrete values of the sensor circuit power supply terminal from approaching each other, and it is resistant to noise. Stable level detection is possible.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

(Embodiment 1) In this embodiment, three sensor circuits of a three-phase eight-pole DC brushless motor will be described. As shown in FIG. 1, 1 is a first sensor circuit, 2
Is a second sensor circuit, and 3 is a third sensor circuit, and outputs high or low level signals as shown in FIG. 4 is the first resistance, 5 is the second resistance, 6
Is a third resistor, which is respectively the first sensor circuit 1,
The second sensor circuit 2 and the third sensor circuit 3 are connected between the output terminal and the power supply terminal. And, these resistance values take different values, and the parallel resistance value of the different resistance values generated by the combination of the high and low voltages generated by the sensor circuit output and the resistance value of other different resistance values become different values. Is set to. Reference numeral 7 is a power supply for the above three sensor circuits. Reference numeral 8 is a fourth resistor, which is a sensor circuit power supply 7 and three sensor circuits 1, 2,
It is connected between the three power supply terminals. Reference numeral 9 denotes an AD conversion circuit, which is connected to the power supply terminal of the sensor circuit. Reference numeral 10 is an arithmetic control unit, to which the output of the AD conversion circuit is connected. Reference numeral 11 is a motor drive circuit for driving the motor. In the case of three phases, the upper arm and the lower arm have a total of six inputs as their inputs. 1
Reference numeral 2 denotes a motor, which is driven by the output of the motor drive circuit, detects the rotation of the rotor by a sensor, and generates a signal shown in FIG. 2 at the output of the sensor circuit. A is the first, second,
The points of the power supply terminals of the third sensor circuits 1, 2, and 3 are shown. The operation of the above configuration will be described.

The outputs of the first sensor circuit 1, the second sensor circuit 2, and the third sensor circuit 3 are in a relationship as shown in states 1 to 6 as shown in FIG. 2 according to the rotation of the DC brushless motor. It outputs high and low levels. That is, there are three states in which any one of them is low, or three in which any two are low, and a total of six different states are output, and these six states are output according to the rotation of the rotor. The state of occurs repeatedly. Here, the voltage generated at the point A is the voltage of the sensor circuit power supply 7 of the fourth resistance 8 and the single resistance of the first to third resistances 4, 5, and 6 or the parallel resistance of the two resistances. The value is divided by the value. Resistance value 4, 5,
Since 6 is a different value, and the parallel resistance value of the two resistors and the other one resistance value are also different values, the generated voltages in the six states do not become the same voltage, but take different discrete values. It becomes a voltage. As a result, the three sensor circuit voltages can be made into a single signal voltage having discrete values at point A. This signal is converted by the AD conversion circuit 9 into a signal having a digitized discrete value, and the arithmetic control means 10 is further operated.
Then, a motor control signal is directly generated from the change in the output value of the AD conversion circuit 9 and its timing, and this is supplied to the motor drive circuit 11. The motor drive circuit 11 receives this and drives the motor.

(Embodiment 2) As shown in FIG. 3, 13 is a first printed circuit board on which a first sensor circuit 1, a second sensor circuit 2 and a third sensor circuit 3 are provided. , A first resistor 4, a second resistor 5, and a third resistor 6 are mounted. Reference numeral 14 is a second printed circuit board on which a sensor circuit power supply 7, a fourth resistor 8, an AD conversion circuit 9, an arithmetic control unit 10 and a motor drive circuit 11 are mounted. Further, 15 and 16 are lead wires connecting the first printed circuit board 13 and the second printed circuit board 14, and the lead wire 11 is the fourth resistor 8 and the first sensor circuit 1 and the second sensor circuit 2. And the power supply terminals of the third sensor circuit 3 are connected. The lead wire 16 connects the negative terminal of the sensor power supply 7 and the negative power terminal of the sensor circuit. With the above configuration, the voltage at the point A is transmitted to the first printed board through the lead wire 15. As a result, the output signal of the sensor circuit can be transmitted to the second printed board as the power supply terminal voltage of the sensor circuit without directly connecting the output signal of the sensor circuit to the second printed board. Hereinafter, the operation will be described with reference to the first embodiment.
Is the same as.

Usually, the first sensor circuit 1, the second sensor circuit 2 and the third sensor circuit 3 exist near the rotor in the motor and are built in the motor, and the motor is fixed to the washing tub. A circuit that constantly vibrates, and accordingly controls and drives the motor based on the output of the sensor circuit (the AD conversion circuit 10 and the arithmetic control means 11 in this embodiment) is mounted on the vibration-free second printed circuit board 10. Therefore, by obtaining the sensor circuit output from the point B as in this embodiment,
It is possible to omit the signal line from the sensor circuit output terminal, which is conventionally required, and it is possible to reduce the number of connection lines.

(Embodiment 3) In FIG. 4, reference numeral 17 is a microcomputer having an AD conversion circuit 9 and an arithmetic control means 10 built therein. As a result, it is not necessary to provide these circuits, and it becomes possible to create a control signal for a motor drive from the sensor circuit power supply terminal voltage only by designing the microcomputer software.

(Embodiment 4) In FIG. 5, reference numeral 18 is a power source for the microcomputer 17. As shown in FIG. 6, by setting the sensor circuit power supply to a voltage higher than the microcomputer power supply, the sensor circuit power supply terminal voltage is set between the microcomputer power supply voltage and the sensor circuit operation guarantee voltage which is the minimum voltage at which the sensor circuit operates. In this case, the selection range of the resistance value is widened as compared with the case where the sensor circuit power supply and the microcomputer power supply are shared, which facilitates the design.

(Embodiment 5) In FIG. 7, reference numeral 19 is a voltage conversion circuit, which in this embodiment comprises a transistor 19a and resistors 19b and 19c. The connection is such that the base of the transistor 19a is connected to the power supply terminal of the sensor circuit, the emitter is connected to the resistor 19c, and the collector is connected to the resistor 19b. The other end of the resistor 19c is connected to the sensor circuit power supply 7, and the other end of the resistor 19b is connected to the negative side terminal of the sensor power supply. And the transistor 19a
Is connected to the AD conversion circuit 9 of the microcomputer 17. With the above configuration, the power supply terminal voltage of the sensor circuit is set between the sensor circuit power supply voltage and the sensor circuit operation guarantee voltage as shown in FIG. By adjusting the value of 19c, it is possible to move within the range of the power supply voltage of the AD conversion circuit. As a result, the setting range of the sensor circuit power supply terminal voltage can be widened, and the first to fourth resistors 4,
The degree of freedom in selecting resistance values of 5, 6, and 8 is increased, and the degree of freedom in design is increased.

(Embodiment 6) In FIG. 9, 20 is a first constant current circuit, 21 is a second constant current circuit, and 22 is a third constant current circuit. Resistance of 5,
Replace with the third resistor 6. It is assumed that these constant current circuits flow constant currents when the output terminal voltages of the first to third sensor circuits 1, 2, 3 become low. With the above configuration, the power supply terminal voltage of the sensor circuit becomes a value obtained by multiplying the current flowing through the fourth resistor 8 by the resistance value of the fourth resistor 8.

By setting the current value to a different value and setting the current value of the sum of the different current values generated by the combination of the high and low voltages generated by the sensor circuit output to a value different from other current values. The six discrete values can be set to different values, and the six states of FIG. 2 can be realized by the power supply terminal voltage of the sensor circuit, and the voltage can be determined by the sum of the current values. Setting of terminal voltage becomes very easy. This also makes it possible to widen the voltage setting range and make the discrete values evenly spaced, which makes it possible to stabilize the level detection in the AD conversion circuit, and is also strong against external noise superimposed on the signal. AD conversion becomes possible.

(Embodiment 7) In FIG. 9, a first constant current circuit 20, a second constant current circuit 21, and a third constant current circuit 22.
The current value of the first constant current circuit 20 is I, the value of the fourth resistor 8 is R, the voltage at the point A is Va, and the power supply voltage for the sensor circuit is V. , Va are voltages as shown in (Table 1), and Va are equally spaced voltages.

[0026]

[Table 1] This enables stable voltage detection resistant to noise.

(Embodiment 8) In the present embodiment, there is a relation of first resistance> second resistance> third resistance, and depending on the set value, the lowest voltage among the six discrete value voltages and The case where the discrete value voltage interval with a low voltage is narrow will be described. In FIG. 10, 23 is an OR circuit, the input of which is connected to the output terminals of the second sensor circuit 2 and the third sensor circuit 3. A fifth resistor 24 is connected to the point A, and the other end is connected to the output of the OR circuit 23.
With the above configuration, when the outputs of the second sensor circuit 2 and the third sensor circuit 3 are both low, the outputs also become low, and the fifth resistor 24 becomes the second resistor 5 and the third resistor 6. The configuration is such that they are connected in parallel, and the voltage at the point A is lower than that when there is no fifth resistor because the fifth resistor is inserted. It becomes possible to widen the voltage difference between the adjacent discrete value voltage (in this case, the adjacent discrete value voltage when the output of the first sensor circuit and the third sensor circuit is low) by the set value of the resistor, It is possible to perform stable voltage detection that is resistant to noise.

[0028]

As described above, according to the first aspect of the present invention, a plurality of rotor position detection signals conventionally required as independent signal lines are shared by the power source line. Therefore, in the printed circuit board design, the design can be facilitated by reducing the number of patterns, and the cost can be reduced by reducing the area of the printed circuit board. In the past, the number of input terminals for circuits such as an AD conversion circuit or a microcomputer that receives a rotor position detection signal was conventionally required, but since it is now single, the number of input terminals can be reduced and the number of circuits can be reduced. It is possible to reduce the price, and thereby the price can be reduced. In the case where the circuit for receiving the signal is a microcomputer, the number of terminals may be insufficient due to an increase in the number of necessary terminals due to the recent increase in functions due to centralized control by the microcomputer. In such a case, an additional circuit had to be added or another microcomputer had to be added, but the present invention enables the deletion of the additional circuit or the abolition of another microcomputer, thereby reducing the cost of parts and parts. It is possible to plan.

According to a second aspect of the present invention,
The printed circuit board on which the sensor circuit placed near the rotor of the motor is mounted does not include other circuits from the viewpoint of vibration, etc., and the rotor position information signal obtained from the sensor circuit is a lead wire on another printed circuit board that does not vibrate. In most cases, the control signal for motor control is created based on the rotor position detection signal on the printed circuit board.
According to the second aspect of the present invention, by eliminating the signal line from the sensor circuit output and sharing the signal line with the power line, it is possible to reduce the number of lead wires and the connectors for connecting the lead wires and the printed circuit board, and the number of parts can be reduced. It is possible to reduce or reduce the area of the printed circuit board, and it is possible to reduce the price. Since the connection by the connector is made by mechanical contact between the terminals, the reliability of the electronic circuit is improved as the number of terminals is reduced from the viewpoint of contact failure. Therefore, the present invention can improve the reliability of the electronic circuit. is there. According to the third aspect of the present invention, since the AD conversion circuit and the arithmetic control means are built in the microcomputer, the rotor position information signal is taken as a single signal into the microcomputer to directly generate the control signal. It is possible to reduce the software as compared with the processing of a plurality of inputs, and it is not necessary to separately provide an AD conversion circuit and arithmetic control means, so that the number of parts can be reduced.
It is possible to save space on the printed circuit board and reduce the price.

According to the fourth aspect of the present invention, by making the power supply voltage for the sensor circuit higher than the power supply voltage for the AD conversion circuit or the microcomputer, the range of selection of the resistance value can be expanded, and the design It becomes possible to secure the easiness of. According to the fifth aspect of the present invention, by providing the voltage conversion circuit between the sensor circuit and the AD conversion circuit or the microcomputer, the sensor circuit power supply terminal voltage can be realized without being aware of the power supply voltage of the AD conversion circuit or the microcomputer. It is possible to determine the value, which allows the setting range of the sensor circuit power supply terminal voltage to be widened, and it is possible to secure the degree of freedom in design and the ease of design.

According to the sixth aspect of the present invention, by adopting the constant current circuit, the sensor circuit power supply terminal voltage is determined by the current, so that the easiness of design is improved and the set voltage width is expanded. It is possible to make the intervals of the discrete values of the sensor circuit output voltage even, which enables stable level detection in the AD conversion circuit, and also strong level detection that is strong against noise superimposed on the signal. Become.

According to the seventh aspect of the present invention, setting the number of sensors to three means a three-phase DC brushless motor, and the current value is one to two in a three-phase drive which is often adopted in washing machines. By adopting the constant current circuit of No. 4, it is possible to make the intervals of the discrete values of the sensor circuit signal voltage even, and in a washing machine or the like in which the lead wire is extended from the sensor circuit, stable level detection in the restoration circuit is possible. In addition to being possible, it is possible to detect a level that is strong and stable especially against noise superimposed on a signal.

According to the eighth aspect of the present invention, it is difficult to equalize the voltage difference between discrete values appearing in a single signal in the system in which the resistor is connected to the sensor circuit. Variation occurs. Therefore, it has been confirmed by an actual constant design that the voltage difference between 3 or 4 discrete values among the 5 voltage differences between discrete values generated by 6 discrete value voltages is enlarged by the selection of the resistance value, and therefore the remaining It is possible to increase the voltage difference between discrete values by adding a resistance to a voltage having a smaller discrete value voltage of 1 or 2 where the voltage difference between discrete values is small, thereby expanding the voltage difference between discrete values. Becomes As a result, in a washing machine or the like in which a lead wire is extended from the sensor circuit, stable level detection can be performed in the restoration circuit, and particularly stable level detection can be performed even against noise superimposed on the signal. .

[Brief description of drawings]

FIG. 1 is a circuit diagram of a first embodiment of the present invention.

FIG. 2 Sensor circuit output waveform diagram

FIG. 3 is a circuit diagram of a second embodiment of the present invention.

FIG. 4 is a circuit diagram of a third embodiment of the present invention.

FIG. 5 is a circuit diagram of a fourth embodiment of the present invention.

FIG. 6 is a diagram showing a sensor circuit power supply terminal voltage of a fourth embodiment.

FIG. 7 is a circuit diagram of a fifth embodiment of the present invention.

FIG. 8 is a diagram showing a sensor circuit power supply terminal voltage and a conversion circuit input voltage according to a fifth embodiment.

FIG. 9 is a circuit diagram of a sixth embodiment of the present invention.

FIG. 10 is a circuit diagram of an eighth embodiment of the present invention.

FIG. 11 is a diagram showing a conventional example.

[Explanation of symbols]

1 First sensor circuit 2 Second sensor circuit 3 Third sensor circuit 4 First resistance 5 Second resistance 6 Third resistance 7 Sensor circuit power supply 8 Fourth resistance 9 AD conversion circuit 10 Arithmetic control means 11 Motor drive circuit 12 motors 13 First printed circuit board 14 Second printed circuit board 15 power lead 16 power leads 17 Microcomputer 18 Microcomputer power supply 19 Voltage conversion circuit 20 First constant current circuit 21 Second constant current circuit 22 Third constant current circuit 23 OR circuit 24 Fifth Circuit

Claims (8)

[Claims] 1. A plurality of sensor circuits for detecting a rotor position of a DC brushless motor, a sensor power source, a resistor connected between power source terminals of the plurality of sensor circuits and the sensor power source, and a sensor circuit of the sensor circuit. Resistances having different values connected between the output terminal and the power supply terminal, and parallel resistance values of the different resistances generated by a combination of high and low voltages generated by the sensor circuit output, and resistance values of other different resistances Of the resistance, the AD conversion circuit connected to the sensor circuit power supply terminal, and the signal which is connected to the output of the AD conversion circuit and includes a plurality of sensor circuit information, and detects a change in the data to directly output the motor control signal. DC brushless motor control device for washing machine having arithmetic control means for outputting 2. A plurality of sensor circuits for detecting a rotor position of a DC brushless motor, a sensor power source, a resistor connected between power source terminals of the plurality of sensor circuits and the sensor power source, and a sensor circuit of the sensor circuit. Resistances having different values connected between the output terminal and the power supply terminal, and parallel resistance values of the different resistances generated by a combination of high and low voltages generated by the sensor circuit output, and resistance values of other different resistances Of the resistance, the AD conversion circuit connected to the sensor circuit power supply terminal, and the signal of the plurality of sensor circuit information connected to the output of the AD conversion circuit to detect the change in the data and directly drive the motor. A first printed circuit board on which arithmetic control means for outputting a signal and a plurality of sensor circuits and resistors connected between output terminals of the sensor circuits and a power supply terminal are mounted. A power source for the sensor, the resistor, an AD conversion circuit, a second printed circuit board on which arithmetic control means is mounted, a first printed circuit board and a second printed circuit board are connected so as to establish the electrical connection. And a DC brushless motor control device for a washing machine, the motor control signal being obtained on the second printed circuit board. 3. A DC brushless motor control device for a washing machine according to claim 1, wherein the microcomputer includes an AD conversion circuit and arithmetic control means, and a motor control signal is output from a microcomputer output terminal. 4. The sensor circuit power supply voltage is configured to be higher than the power supply voltage of the AD conversion circuit or the microcomputer to which the power supply terminal of the sensor circuit is connected, and the power supply terminal voltage of the sensor circuit is an operation guarantee of the sensor circuit. The washing machine DC according to any one of claims 1 to 3, wherein the resistance values of the resistors and the resistors having different values are set so that the voltage is not less than the minimum voltage and not more than the power supply voltage of the AD conversion circuit or the microcomputer.
Brushless motor controller. 5. The motor control device according to claim 4, further comprising a voltage conversion circuit between the power supply terminal of the sensor circuit and the AD conversion circuit or the microcomputer. 6. A resistor connected between an output terminal of a sensor circuit and a power supply terminal, the current value having a different value, and the different generated by a combination of high and low voltages generated by the sensor circuit output. 6. The DC brushless motor control device for a washing machine according to claim 1, further comprising a constant current circuit in which a current value of a sum of current values is different from other current values. 7. The washing machine DC according to claim 6, wherein the number of sensors is 3, and the constant current value of each sensor circuit is 1: 2: 4.
Brushless motor controller. 8. The washing machine according to claim 1, further comprising a parallel resistance generating circuit in which the number of sensors is 3 and an additional current flows when two sensor circuit output terminal currents flow. DC brushless motor controller for car.