CN215300542U

CN215300542U - Load induction type chain saw alternating current motor control circuit

Info

Publication number: CN215300542U
Application number: CN202120708725.1U
Authority: CN
Inventors: 戴光前
Original assignee: Shaoxing Shangyu Guanye Electric Appliance Co ltd
Current assignee: Shaoxing Shangyu Guanye Electric Appliance Co ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-12-24
Anticipated expiration: 2031-04-08

Abstract

The utility model discloses a load induction type chain saw AC motor control circuit, which comprises an AC motor, a motor connecting terminal, a silicon controlled rectifier, a connecting terminal, a starting connecting terminal, a power supply connecting terminal and a chip; the alternating current motor is connected with a motor connecting terminal through a circuit, and the motor connecting terminal is connected with the controlled silicon through a circuit; the silicon controlled rectifier is connected with the resistor group and the first resistor through circuits respectively; the first resistor is connected with a sixth pin of the chip through a circuit; the resistor group is connected with the connecting terminal through a line; the connecting terminal is respectively connected with the fifth capacitor and the alternating current input end through a line; the alternating current input end is connected with the first switch and the second switch through lines respectively; the second switch is connected with the power supply connecting terminal through a line. The utility model discloses be fit for the equipment that the output has cutting function, have energy saving and consumption reduction, the power saving just increases the characteristics of equipment work duration.

Description

Load induction type chain saw alternating current motor control circuit

Technical Field

The utility model relates to a load induction type chain saw alternating current motor control circuit.

Background

When garden maintenance equipment such as an existing cutting, irrigating and mowing integrated machine, a brush cutter, a mower and the like is used, the state of cutting branches is not always kept in the whole process after the machine is started; however, in the working process of the existing equipment, the motor always keeps normal operation at the same rotating speed and power, for example, 1000 revolutions of power is 1000 w; that is to say, when the output end of the machine of the existing equipment circuit idles, the motor can not reduce the rotating speed and the power, and the energy conservation and the consumption reduction can not be realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a load induction type chain saw AC motor control circuit is fit for the output and has cutting function's equipment, has energy saving and consumption reduction, and the power saving just increases the characteristics of equipment work duration.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a load induction type chain saw alternating current motor control circuit comprises an alternating current motor, a motor connecting terminal, a controlled silicon, a connecting terminal, a starting connecting terminal, a power supply connecting terminal and a chip; the alternating current motor is connected with a motor connecting terminal through a circuit, and the motor connecting terminal is connected with the controlled silicon through a circuit; the silicon controlled rectifier is connected with the resistor group and the first resistor through circuits respectively; the first resistor is connected with a sixth pin of the chip through a circuit; the resistor group is connected with the connecting terminal through a line; the connecting terminal is respectively connected with the fifth capacitor and the alternating current input end through a line; the alternating current input end is connected with the first switch and the second switch through lines respectively; the second switch is connected with the power supply connecting terminal through a circuit; the fifth capacitor is connected with the second switch and a circuit between the power supply connecting terminals through a circuit; the power supply connecting terminal is connected with a fourth resistor through a line, and the fourth resistor is connected with a fourth capacitor through a line; a circuit between the power connection terminal and the fourth resistor is connected with a second resistor, and the second resistor is connected with a seventh pin of the chip through the circuit; the fourth capacitor is connected with the first diode and the second diode through lines respectively; the second diode is respectively connected with the third diode, the first capacitor and the thirteenth resistor through circuits; the first diode is connected with the resistor group through a line; the circuit between the first diode and the resistor group is respectively connected with a third diode, a first capacitor and a thirteenth resistor through circuits; the first switch is connected with the starting connecting terminal through a circuit; the circuit between the first switch and the starting connection terminal is connected with the alternating current motor through a circuit; the starting connecting terminal is connected with a third resistor through a line; the third resistor is connected with the twelfth resistor through a line; a circuit between the third resistor and the twelfth resistor is connected with a fourth pin of the chip through a circuit; the twelfth resistor is connected with the first pin of the chip through a line; the twelfth resistor is also connected with the circuit between the first diode and the resistor group through a circuit; the eighth pin of the chip is connected with the lines between the second diode and the first capacitor through the lines, and the lines between the eighth pin of the chip and the second diode and the first capacitor are also connected with a seventh resistor, an eighth resistor and a tenth resistor through the lines; the seventh resistor is connected with the fourth diode and the fifth resistor through lines respectively; the fourth diode is connected with the resistor group through a line; the fifth resistor is respectively connected with the second capacitor and the base electrode of the triode through circuits; the emitting electrode of the triode is connected with the sixth resistor; the collector of the triode is respectively connected with the eighth resistor, the ninth resistor and the eleventh resistor through circuits; the ninth resistor is connected with the tenth resistor through a line; the second pin of the chip is connected with the fifteenth resistor through a line, and the line between the second pin of the chip and the fifteenth resistor is connected with the line between the ninth resistor and the tenth resistor through a line; a third pin of the chip is connected with a fourteenth resistor through a line, and a line between the third pin of the chip and the fourteenth resistor is connected with an eleventh resistor through a line; the circuit between the first diode and the resistor group is also connected with a second capacitor and a sixth resistor through a circuit; the fourteenth resistor and the fifteenth resistor are connected with the green LED and the red LED through circuits; and 2 said LED luminescent diode is connected in series through the circuit; and the circuit among the 2 LED light-emitting diodes is connected with the fifth pin of the chip through a circuit.

The resistor group comprises four resistors connected in parallel, namely a first resistor, a second resistor, a third resistor and a fourth resistor.

The utility model has the advantages that: the utility model discloses establish ties a load induction type chain saw alternating current motor control circuit to original circuit on, come the rotational speed power of control motor, for example when the machine output is idle running, the motor can keep low-speed, and low power function, for example 400 change power 400w, then when the branch is cut to the output (for example, the cutting piece), motor rotational speed power becomes the normal value, 1000 changes 1000 w. The circuit of the utility model can be connected in series to different machines, is suitable for equipment with cutting function at the output end, and has low rotating speed and low power when the cutting machine does not cut wood; the method has the characteristics of saving energy, reducing consumption, saving electricity and increasing the working endurance capacity of equipment.

Drawings

Fig. 1 is a flow chart of the present invention.

Detailed Description

In the load induction type chain saw AC motor control circuit of the embodiment, an AC INPUT end AC230V-INPUT of the circuit of the embodiment is connected in series with an original circuit of garden maintenance equipment such as a brush cutter, a grass trimmer and the like; as shown in fig. 1, the MOTOR comprises an alternating current MOTOR AC, a MOTOR connecting terminal M1, a thyristor T1, a connecting terminal N, a starting connecting terminal KON, a power connecting terminal KPWR and a chip MCU; the alternating current MOTOR MOTOR AC is connected with a MOTOR connecting terminal M1 through a line, and the MOTOR connecting terminal M1 is connected with a controllable silicon T1 through a line; the controllable silicon T1 is respectively connected with the resistor group RO and the first resistor R1 through lines; the first resistor R1 is connected with a sixth pin of the chip MCU through a circuit; the resistor group RO is connected with the connecting terminal N through a line; the connecting terminal N is respectively connected with a fifth capacitor C5 and an alternating current INPUT end AC230V-INPUT (a live wire is arranged at the L end, and a zero wire is arranged at the N end) through a line; the alternating current INPUT end AC230V-INPUT is respectively connected with a first switch K1 and a second switch K2 through lines; the second switch K2 is connected with a power supply connecting terminal KPWR through a circuit; the fifth capacitor C5 is connected with a circuit between the second switch K2 and the power supply connecting terminal KPWR through a circuit; the power supply connecting terminal KPWR is connected with a fourth resistor R4 through a circuit, and the fourth resistor R4 is connected with a fourth capacitor C4 through a circuit; a circuit between the power supply connecting terminal KPWR and the fourth resistor R4 is connected with a second resistor R2, and the second resistor R2 is connected with a seventh pin of the chip MCU through a circuit; the fourth capacitor C4 is respectively connected with the first diode D1 and the second diode D2 through lines; the second diode D2 is respectively connected with a third diode D3, a first capacitor C1 and a thirteenth resistor R13 through lines; the first diode D1 is connected with the resistor group RO through a line; a line between the first diode D1 and the resistor group RO is respectively connected with a third diode D3, a first capacitor C1 and a thirteenth resistor R13 through lines; the first switch K1 is connected with the starting connection terminal KON through a line; the line between the first switch K1 and the starting connection terminal KON is connected with the alternating current MOTOR AC through a line; the starting connection terminal KON is connected with a third resistor R3 through a line; the third resistor R3 is connected with a twelfth resistor R12 through a line; a circuit between the third resistor R3 and the twelfth resistor R12 is connected with a fourth pin of the chip MCU through a circuit; the twelfth resistor R12 is connected with a first pin of the chip MCU through a circuit; the twelfth resistor R12 is also connected with a line between the first diode D1 and the resistor group RO through a line; an eighth pin of the chip MCU is connected with a line between the second diode D2 and the first capacitor C1 through a line, and a seventh resistor R7, an eighth resistor R8 and a tenth resistor R10 are further connected on the line between the eighth pin of the chip MCU and the second diode D2 and the first capacitor C1 through lines; the seventh resistor R7 is respectively connected with the fourth diode D4 and the fifth resistor R5 through lines; the fourth diode D4 is connected with the resistor group RO through a line; the fifth resistor R5 is respectively connected with the second capacitor C2 and the base electrode of the triode Q1 through lines; the emitter of the triode Q1 is connected with a sixth resistor R6; the collector of the triode Q1 is respectively connected with an eighth resistor R8, a ninth resistor R9 and an eleventh resistor R11 through lines; the ninth resistor R9 is connected with the tenth resistor R10 through a line; a second pin of the chip MCU is connected with a fifteenth resistor R15 through a line, and a line between the second pin of the chip MCU and the fifteenth resistor R15 is connected with a line between a ninth resistor R9 and a tenth resistor R10 through a line; a third pin of the chip MCU is connected with a fourteenth resistor R14 through a circuit, and a circuit between the third pin of the chip MCU and the fourteenth resistor R14 is connected with an eleventh resistor R11 through a circuit; the line between the first diode D1 and the resistor group RO is also connected with a second capacitor C2 and a sixth resistor R6 through lines; the fourteenth resistor R14 and the fifteenth resistor R15 are connected with the green LED LEDG and the red LED LEDR through circuits; and 2 said LED LEDGs are connected in series through the circuit; and the circuit between the 2 LED LEDs LEDG is connected with the fifth pin of the chip MCU through a circuit. The resistor group RO comprises four resistors connected in parallel, namely a resistor group first resistor RO1, a resistor group second resistor RO2, a resistor group third resistor RO3 and a resistor group fourth resistor RO 4.

The working principle of the embodiment is as follows: when the front baffle is pulled to the working position, the second switch K2 is switched on, the 230V alternating current L end is switched on through a loop of the second K2, the power connection terminal KPWR, the fourth resistor R4, the fourth capacitor C4, the first diode D1, the second diode D2, the third diode D3, the resistor group R0 and the connection terminal N, and 5V direct current voltage is established on the first capacitor C1 (electrolytic capacitor) to supply power to the control circuit. And the L end (live wire) of the alternating current INPUT end AC230V-INPUT provides a synchronous signal for the seventh pin of the chip MCU through a second resistor R2, and the positive and negative half-cycle states of the alternating current at the time of passing 0 are judged. When the first switch K1 is turned on, the L terminal is divided by the first K1, the starting connection terminal KON is divided by the third resistor R3 and the twelfth resistor R12, a voltage of 0V is provided to the fourth pin of the chip MCU during the negative half cycle of the alternating current, a voltage of +5V is provided during the positive half cycle, all the pins of the chip MCU are internally provided with the protection diodes connected to the power supply terminal 1 pin and the ground terminal 8 pin of the chip MCU, and the fourth pin of the chip MCU is always at a voltage of +5V when the first switch K1 is turned off, so that whether the first switch K1 is turned on or not can be determined during the negative half cycle.

When the first switch K1 is turned on, a negative pulse is output through the sixth pin after the time of 0 passing through the inside of the chip MCU through the accurate timing operation, and the thyristor T1 is triggered to conduct in a chopping mode through the first resistor R1, so that the 230V AC power passes through the first switch K1, the AC MOTOR AC, the thyristor T1, the resistor group R0, and the N-terminal of the connection terminal to form a loop, and the AC MOTOR AC provides a corresponding AC voltage according to a required speed. The resistor group R0 samples the motor current in parallel by 4 0.1 ohm/2W resistors (a resistor group first resistor RO1, a resistor group second resistor RO2, a resistor group third resistor RO3 and a resistor group fourth resistor RO 4), provides a current sampling signal to the base of the triode Q1 through a fourth diode D4 and a fifth resistor R5 during a positive half cycle, provides a load signal to the third pin of the chip MCU through a triode Q1, provides an overload signal to the second pin of the chip MCU through an eleventh resistor R11 and a ninth resistor R9 and a tenth resistor R10 by voltage division, and receives the 2 signals at a specific time of the positive half cycle, and provides corresponding pulse voltage to the LED through a fourteenth resistor R14 and a fifteenth resistor R15 during the rest time according to the conditions of the color, the flicker of the LED.

The specific operation of the LED is as follows: when the second switch K2 is turned on, a yellow light is on (namely, in the fixed time of turning on the second switch K2, a red light is on by 60%, a green light is on by 40%, so that the visual effect is that the yellow light is on), when the first switch K1 is turned on, the green light is on (the green LED is on by 100%), within 1 second, the thyristor T1 is controlled to be soft-started from 0V to 110V to provide a no-load voltage for the alternating current MOTOR AC, at the moment, the MOTOR operates at a low speed, when the current exceeds the no-load current value during sawing, the soft-start is continuously output to a maximum voltage to operate at a full speed, when the load is increased to a certain degree, the red light flickers (the red LED is on by 100%), when the overload exceeds 1 second, the thyristor T1 is turned off, and simultaneously, the red light (the red LED is on by 100%), and the yellow light is on until the first switch K1 is turned off to stand by standby. If K1 is turned on first and then K2 is turned on, the EK-9 protocol is prohibited from being started by the motor.

Claims

1. A load induction type chain saw alternating current motor control circuit is characterized by comprising an alternating current motor, a motor connecting terminal, a controlled silicon, a connecting terminal, a starting connecting terminal, a power supply connecting terminal and a chip; the alternating current motor is connected with a motor connecting terminal through a circuit, and the motor connecting terminal is connected with the controlled silicon through a circuit; the silicon controlled rectifier is connected with the resistor group and the first resistor through circuits respectively; the first resistor is connected with a sixth pin of the chip through a circuit; the resistor group is connected with the connecting terminal through a line; the connecting terminal is respectively connected with the fifth capacitor and the alternating current input end through a line; the alternating current input end is connected with the first switch and the second switch through lines respectively; the second switch is connected with the power supply connecting terminal through a circuit; the fifth capacitor is connected with the second switch and a circuit between the power supply connecting terminals through a circuit; the power supply connecting terminal is connected with a fourth resistor through a line, and the fourth resistor is connected with a fourth capacitor through a line; a circuit between the power connection terminal and the fourth resistor is connected with a second resistor, and the second resistor is connected with a seventh pin of the chip through the circuit; the fourth capacitor is connected with the first diode and the second diode through lines respectively; the second diode is respectively connected with the third diode, the first capacitor and the thirteenth resistor through circuits; the first diode is connected with the resistor group through a line; the circuit between the first diode and the resistor group is respectively connected with a third diode, a first capacitor and a thirteenth resistor through circuits; the first switch is connected with the starting connecting terminal through a circuit; the circuit between the first switch and the starting connection terminal is connected with the alternating current motor through a circuit; the starting connecting terminal is connected with a third resistor through a line; the third resistor is connected with the twelfth resistor through a line; a circuit between the third resistor and the twelfth resistor is connected with a fourth pin of the chip through a circuit; the twelfth resistor is connected with the first pin of the chip through a line; the twelfth resistor is also connected with the circuit between the first diode and the resistor group through a circuit; the eighth pin of the chip is connected with the lines between the second diode and the first capacitor through the lines, and the lines between the eighth pin of the chip and the second diode and the first capacitor are also connected with a seventh resistor, an eighth resistor and a tenth resistor through the lines; the seventh resistor is connected with the fourth diode and the fifth resistor through lines respectively; the fourth diode is connected with the resistor group through a line; the fifth resistor is respectively connected with the second capacitor and the base electrode of the triode through circuits; the emitting electrode of the triode is connected with the sixth resistor; the collector of the triode is respectively connected with the eighth resistor, the ninth resistor and the eleventh resistor through circuits; the ninth resistor is connected with the tenth resistor through a line; the second pin of the chip is connected with the fifteenth resistor through a line, and the line between the second pin of the chip and the fifteenth resistor is connected with the line between the ninth resistor and the tenth resistor through a line; a third pin of the chip is connected with a fourteenth resistor through a line, and a line between the third pin of the chip and the fourteenth resistor is connected with an eleventh resistor through a line; the circuit between the first diode and the resistor group is also connected with a second capacitor and a sixth resistor through a circuit; the fourteenth resistor and the fifteenth resistor are connected with the green LED and the red LED through circuits; and 2 said LED luminescent diode is connected in series through the circuit; and the circuit among the 2 LED light-emitting diodes is connected with the fifth pin of the chip through a circuit.

2. The load sensing chain saw ac motor control circuit as recited in claim 1 wherein said resistor bank comprises four resistors connected in parallel, a first resistor of the resistor bank, a second resistor of the resistor bank, a third resistor of the resistor bank, and a fourth resistor of the resistor bank.