CN201690396U - Fixed frequency control device - Google Patents

Abstract

A kind of fixed frequency control device, fix to power and apparatus, it includes a selective switch that can choose the frequency conversion to run or send and run directly, when switching over to sending and running the function directly, the electric power does not pass the fixed frequency control device and transmit to the motor of the apparatus directly, provide the electronic equipment to run and actuate; when the frequency conversion operation function is switched, the programmable logic controller in the fixed frequency control device is started, the programmable logic controller drives the timer to set the operation time and the frequency controller to adjust the frequency so as to control the frequency converter, and the frequency converter adjusts and controls the load rotation speed of the motor of the equipment, so that the energy-saving effect is achieved; all the components are arranged in a switch box, the selection switch and the warning lamp are arranged outside the box, the operation and the management are easy, and the operation can be performed by a common operator when the setting and the adjustment are needed, without depending on a professional and advanced engineer, so that the intelligent control system is a progressive creation.

Description

Fixed frequency control device

technical field

The utility model relates to the field of electric equipment, in particular to a fixed-frequency control device arranged between a power supply and equipment.

Background technique

In recent years, due to the gradual lack of energy, how to effectively save energy has become a major issue in the industry. With the increasing power demand of electrical equipment, how to improve the power saving and energy saving effect, so how to increase the power consumption under the same power consumption The use efficiency of equipment or how to increase the number of electrical equipment under the same power consumption has become extremely urgent.

Among them, as far as the general existing frequency conversion energy-saving device applied to the motor is concerned, it includes a mechanical controller, a pressure flow control unit, a frequency converter and a motor, and the mechanical controller passes through the pressure flow control unit. Control the frequency converter so that the frequency converter can change the fixed power supply voltage and frequency into a variable variable, adjust the running speed of the motor steplessly, and adjust the air volume of the fan, or the water volume and speed of the pump, or the load of the hydraulic machinery Energy saving; however, although the above-mentioned frequency conversion power saving device can achieve the expected effect of energy saving, it can only perform single-mode control.

Although the above-mentioned frequency conversion energy-saving device can achieve the effect of saving energy and electricity on the motor, however, the frequency conversion energy-saving device must be produced together with the motor and electrically connected to each other during manufacture. When building a frequency conversion energy-saving device, the purpose of saving energy cannot be achieved through the frequency conversion device, and the user must replace its electrical equipment, which will also cause a burden on the user's use cost; therefore, how to save energy without replacing the existing electrical equipment? It can also achieve the purpose of frequency conversion and energy saving, which is another problem that needs to be overcome and solved urgently.

In particular, common products are often equipped with separation devices such as frequency conversion devices, timers, etc., which makes operation inconvenient. When setting and adjusting, it is necessary to rely on experienced professional senior engineers, which greatly reduces work efficiency. It can be seen that there are still many deficiencies in the above-mentioned conventional electric equipment. In view of the shortcomings derived from the above-mentioned conventional electric equipment, the author of this case made improvements and innovations, and after years of research, he finally successfully developed and completed this fixed-frequency control device.

Utility model content

The purpose of the utility model is to provide a fixed-frequency control device with compact structure and simple operation, which only needs to be installed between the power supply and the equipment without refitting the existing equipment.

To achieve this purpose, the technical solution adopted by the utility model is: a fixed frequency control device, which includes: a selection switch, which is arranged outside the switch box, for the user to switch and select the input power system through frequency conversion operation or direct transmission To run on the motor of the equipment, when the user switches to the direct transmission operation function, the power is directly transmitted to the motor operation of the equipment through the direct transmission power switch, and when the user switches to the frequency conversion operation function, the following programmable programs are activated Logic controller; a programmable logic controller, which starts by selecting the electric power during variable frequency operation through the selector switch, and drives the timer in it to set the running time and the frequency controller to adjust the frequency; a frequency converter, which is controlled by a programmable The logic controller controls its operation to change the frequency and amplitude of the power supply, and starts the motor of the equipment through the variable frequency power switch in the fixed frequency control device.

The selector switch is provided with an indicator light, and the selector switch, indicator light, programmable logic controller, timer, frequency converter, frequency controller, etc. are all assembled and arranged in the switch box.

The indicator light is set on the periphery of the selector switch, and is displayed in different colors according to the mode of the selector switch and abnormal conditions.

With the above solution, the user can operate the selection switch to select whether the input power is transmitted to the motor of the equipment through frequency conversion operation or direct transmission operation. When the user switches to the direct transmission operation function, the power is directly transmitted to the equipment without going through the fixed frequency control device. The motor then runs; when the user switches to the frequency conversion function, the following programmable logic controller is started, and the programmable logic controller controls the operation of the frequency converter, and the frequency and amplitude of the power supply are changed to adjust the equipment. The load rotation speed of the motor is high, which further achieves the energy-saving effect; and all components are combined in a switch box, and the selection switch and warning light are set outside the box, which is easy to operate and manage, and when setting adjustments are required, the general operator It can be implemented without relying on experienced professional senior engineers.

Description of drawings

Fig. 1 is a schematic diagram of an implementation block of the fixed frequency control device of the present invention.

Fig. 2 is a schematic diagram of the frequency conversion operation characteristics of the fixed frequency control device of the present invention.

Fig. 3 is a schematic diagram of the power consumption reduction of motors with different powers in the fixed-frequency control device of the present invention.

Explanation of main component symbols

1 Fixed frequency control device 10 Selector switch 20 Programmable logic controller

30 Timer 40 Frequency Controller 50 Inverter

60 direct power switch 70 variable frequency power switch 80 motor

Detailed ways

The utility model is described in detail below in conjunction with preferred embodiments and accompanying drawings.

Please refer to shown in Fig. 1, it is the implementation block diagram of the fixed-frequency control device provided by the utility model, and it comprises:

A selector switch 10 is set outside the switch box, which can be used to switch and select the input power, through frequency conversion operation or directly sent to the motor 80 of the equipment, when switching to the direct transmission function, the power is directly transmitted without going through the fixed frequency control device 1 To the motor 80 of the equipment and then run actuation, when switching to the frequency conversion operation function, then start the following programmable logic controller 20;

A programmable logic controller 20 is started by the power supply delivered by the selector switch 10, and the programmable logic controller 20 drives the timer 30 to set the running time and the frequency controller 40 to adjust the frequency;

A frequency converter 50, whose operation is controlled by the programmable logic controller 20, the function of the frequency converter 50 is to change the frequency and amplitude of the power supply, thereby changing the cycle of its moving magnetic field, and through the frequency conversion in the fixed frequency control device 1 The power switch 70 starts the motor 80 of the equipment, and the load rotation speed of the motor 80 of the equipment is adjusted through the frequency converter 50 to further achieve energy-saving effects. In addition, the utility model can be installed outdoors or indoors according to the user's purpose.

It is worth mentioning that when the user operates the selector switch 10, the indicator light (not shown) beside it will be displayed in different colors according to the selected mode, (for example, a green light indicates direct power transmission operation, a red light indicates Frequency conversion operation), when an abnormal situation occurs, the fault indicator (orange light) will light up, allowing the user to deal with it immediately.

Please refer to Fig. 2 and Fig. 3, which are schematic diagrams of the frequency conversion operation characteristics of the fixed frequency control device of the present invention and motors with different powers can reduce power consumption diagrams; because fans and pumps have the following characteristics P (motor power consumption)=Q (flow or air volume) x H (head or pressure), and the flow (Q) is proportional to the motor speed (N), and the head (H) is proportional to the square of the motor speed (N), so the rated rotation can be reduced through the inverter Speed, if the rated rotation speed of the fan and circulation pump is reduced, as shown in Figure 2 and Figure 3, the power consumption of the motor can be reduced due to the frequency conversion operation characteristics (the reduction rate is proportional to the third power of the rotation speed), And then achieve a lot of energy saving effect.

The above detailed description is a specific description of a feasible embodiment of the utility model. This embodiment is not used to limit the patent scope of the utility model. All equivalent implementations that do not depart from the claims of the utility model and the contents of the description or changes, should be included in the patent scope of this case.

Claims (3)

1. decide audio-frequency control device for one kind, it is characterized in that: include,

One selector switch, be arranged at the switch-box outside, for switching selection input power supply is to turn round to the motor of equipment through frequency conversion running or direct sending, when switching to the direct sending function of motion, see through the direct sending mains switch and directly transmit the motor running start of electric power to equipment, when switching to the frequency conversion function of motion, then start following programmable logic controller;

One programmable logic controller, the electric power when seeing through selector switch and selecting the frequency conversion running and starting, and drive timer in it and set the duration of runs and the frequency controller size of adjusting frequency;

One frequency converter is controlled its running by the programmable logic controller, in order to the frequency and the amplitude of change power supply, and sees through the motor of deciding the switch activated equipment of variable frequency power supply in the audio-frequency control device.

2. as claimed in claim 1ly decide audio-frequency control device, it is characterized in that: this selector switch is provided with indicator light, and selector switch, indicator light, programmable logic controller, timer, frequency converter, frequency controller etc. are all assembled and are arranged at switch-box.

3. as claimed in claim 2ly decide audio-frequency control device, it is characterized in that: this indicator light is arranged at the periphery of selector switch, and during according to selector switch pattern and unusual condition, shows with different colours light respectively.

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