JPH0538191A - 110v/220v combining power supply device for universal motor - Google Patents

Abstract

PURPOSE: To provide a power supply device compatible with 110V/220V which, when a power voltage is 110V AC, generates a DC current corresponding to 220V so as to impress it on a universal motor when, and the AC power is 220V, supplies it as it is. CONSTITUTION: This device is made up of five parts, applied voltage detecting part 1 which detects the root-mean-square value of an AC voltage applied, a power detecting part 2 which divides the detected voltage at an appropriate ratio and amplifies it via a multiplier, a distribution voltage rectifying part 3 which, when an AC power of 110V is supplied, can extract a DC output voltage to be governed by this power, a DC-AC power switching part 4 which outputs a specified voltage by operating a relay, and a power control part 5 which controls the voltage to a target specified power, based on the output voltage of the power detecting part 2.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a universal electric motor.
Related to 10V / 220V dual power supply device, more specifically for universal electric motor that can be moved by DC power supply or AC power supply 1
When an AC voltage of 10 V is applied, this AC power supply is rectified by distribution voltage and output at a DC level corresponding to the average value of the AC power supply 220 V, so that the current flowing through the universal motor is kept constant and variations in characteristics occur. The present invention relates to a 110 V / 220 V dual-purpose power supply device for a universal electric motor that does not cause noise.

[0002]

2. Description of the Related Art Conventionally, in applying a power source to a universal motor, an AC power source 11 is used.
Not only is there a device that uses both 0V and an AC power supply 220V, but a device that uses a 110V / 220V switching rewinding motor has different voltages and currents applied to it.
There were problems such as differences in the characteristics of the electric motor and shortening of the life.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and when a 110V AC voltage is applied, an effective value 220 is obtained by using a voltage distribution rectifier circuit.
To provide a 110V / 220V dual-purpose power supply device for a universal motor, which is a DC power source corresponding to V, is applied to a universal motor, and is supplied with a 220V AC power source as it is. Has a purpose.

[0004]

To achieve the above object, the present invention provides a transformer T1, diodes D1-D4, O.
An applied power supply detection unit 1 configured of P amplifiers OP1 and OP2, a regulator U1, a transistor Q1 and the like, for detecting an effective value of an applied AC voltage, and a transferer T.
2, analog operational amplifier U2, OP amplifier OP3-OP
5, a resistor R11-R23, capacitors C4-C6, and diodes D6-D7 divide the detected voltage at an appropriate ratio, and a power detector 2 that amplifies the voltage via the multiplier U2, resistors R27, R28, and diode D8. -D9,
When the 110V AC power supply is supplied and is composed of the capacitors C7 and C8, the distribution voltage rectification unit 3 capable of extracting the DC output voltage controlled by the AC power supply and the contacts of the switches SW1, SW2 and SW3 are operated by the operation of the relay RY. Then, the DC / AC power supply switching unit 4 that outputs a predetermined voltage, the phase controller U3, the resistors R24 to R26, the capacitor C9, and the triac TC are used. It is characterized in that it is configured from a power control unit 5 for controlling the.

[0005]

In the present invention, when an AC voltage of 110V is applied, a DC power supply corresponding to an effective value of 220V is formed by using a voltage distribution rectifier circuit, and this is applied to a universal motor, and an AC voltage of 220V is applied. In this case, the relay RY of the switching unit, which detects this, switches various switches and can immediately apply the 220V AC voltage to the electric motor through the triac.

[0006]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 1 is a block diagram showing the overall configuration of a power supply device according to a first embodiment of the present invention. Figure 1 above
The power supply device shown in FIG. 1 reduces the voltage applied by the transformer T1 to an appropriate ratio suitable for control, and reduces the diode D.
1, D2, capacitors C1 and C3, and a regulator U1 supplies power to the detection circuit, divides the power supply voltage charged in the capacitor C1 and supplied to an appropriate ratio, and divides the non-inverting end of the OP amplifier OP1 ( +) And the inverting end (-) of the OP amplifier OP2, respectively.

At this time, when 220V AC power is supplied from the outside and the potential at the non-inverting end of the OP amplifier (OP1) is higher than the potential at the inverting end, the OP amplifier OP1 outputs a high level output and the 110V AC power supply. Is supplied and the potential at the inverting end is higher than that at the non-inverting end, a low level output close to 0 is output. When a high level is output, the relay RY is driven via the transistor Q1. Although 220 V is sensed, the AC voltage is controlled by the triac TC while the switches SW1, SW2 and SW3 of the AC / DC switching unit 4 shown in FIG. 3 are switched to the contact 2 by driving the relay RY. Is applied. On the other hand, the state shown in FIG. 3 shows the case where 110V is applied, and the DC voltage generated by the distribution voltage rectification unit 3 obtains the “+” polarity at the capacitor C7 and the switch (SW3). A "-" polarity is obtained through the contact No. 1.

Next, the power detector will be described. The voltage applied by the resistors R7 to R10 and the OP amplifier OP2 is appropriately amplified and output to the multiplier U2 of the power detection unit 2, and the voltage detected from the transformer T2 connected to the external power supply is divided into appropriate ratios. It is applied to the OP amplifier OP3, and again amplified by the OP amplifier (OP3) and input to the other input terminal of the multiplier U2. The multiplier U2 multiplies two input values applied from the output terminals of the OP amplifiers OP2 and OP3, amplifies the values by the OP amplifiers OP4 and OP5, and then applies the values to the power control unit 5.

In the phase controller U3 of the power control unit 5, in order to prevent overvoltage from being supplied to the electric motor, 220V AC power is immediately applied to the distribution voltage rectification unit 3 which will be described later while power is being supplied. , The output voltage of the OP amplifier OP5 is delayed to delay the AC half cycle section to lower the charging potential of the distribution voltage rectification unit 3, and from that point of view, the triac TC is turned on via the resistor R24 to obtain the desired power. Control can be performed.

On the other hand, resistors R27, R28 and diode D
In the distribution voltage rectification unit 3 composed of 8, D9 and capacitors C7, C8, 110V input to the resistor R27.
When the AC voltage has a positive (+) polarity, the capacitor C7 is charged to an extent similar to the power supply voltage while the rectified current flows through the diode D8, and in the next negative (-) polarity half cycle, the diode is charged. The voltage input via D9 charges the capacitor C8. In other words, the voltage charged in the capacitors C7 and C8 is 2 Erms (effective value), so that a voltage about twice that of the 110 V AC power source is applied to the universal motor 6.

Next, the process in which 220V AC power is directly supplied to the motor will be described. As mentioned above, 22
When the 0V AC power is supplied, the relay RY included in the applied power detection unit 1 operates, and the switches SW1, SW2 and SW3 interlocked by the relay RY are connected to the contact 2
Respectively, and at this time, the phase controller V3
After delaying the half cycle section of the 0V AC power supply, a trigger pulse is output through the resistor R24 to make the triac TC conductive, and the power supply terminals U and V are connected to 220V.
V AC power is directly supplied to the electric motor 6 via the lead wires A and B.

At this time, the switches SW1, SW2,
The capacitors C7 and C8 are short-circuited by switching SW3. On the other hand, the phase controller V3 includes capacitors C7 and C8.
Immediately after 220V DC power is charged
When the peak value (peak value) of the V AC power supply is supplied,
Delaying the cycle for preventing the voltage charged in the capacitor, that is, the half cycle of the AC power supply, in order to prevent the overvoltage, which is the sum of the peak values of the DC power supply and the 220V AC power supply, from being supplied to the motor. become.

[0013]

As described above, according to the present invention, 1
When 10V is applied, the universal motor is driven by the DC voltage that is rectified by the distribution voltage rectification unit with a double peak value.
When the AC voltage of 20 V is applied, the AC voltage is used for driving, so that the drawbacks such as shortening the life of the conventional electric motor can be solved.

[Brief description of drawings]

FIG. 1 is an overall block diagram of a power supply device of the present invention.

FIG. 2 is an electric circuit diagram I of the present invention.

FIG. 3 is an electric circuit diagram II of the present invention.

[Explanation of symbols]

 1 Applied Power Source Detection Section 2 Electric Power Detection Section 3 Distribution Voltage Rectification Section 4 AC / DC Switching Section 5 Universal Motor R1-R28 Resistance C1-C9 Capacitor D1-D9 Diode OP1-OP5 OP Amplifier SW1-SW3 Switch T1, T2 Transformer U1- U3 IC RY Relay TC Triac Q Transistor

Claims (1)

Claims: 1. A universal electric motor 110V / 220.
In the V-combined power supply device, an applied power supply detection unit 1 that detects the effective value of the applied AC voltage, a power detection unit 2 that divides the detected voltage into an appropriate ratio, and amplifies it through a multiplier U2, and an input. A distribution voltage rectifying unit 3 configured to extract a DC output voltage that is about twice the generated voltage;
Switch SW1, SW2, SW by the operation of relay RY
The target power control can be performed by the AC / DC switching unit 4 that outputs a predetermined voltage by changing the contacts of 3 and the output voltage of the power detection unit 2. The phase controller U3 and the resistors R24-R2
A 110 V / 220 V dual-purpose power supply device for a universal electric motor, which is provided with a power control unit 5 including a capacitor 6, a capacitor C9, a triac TC, and the like.