• Shenzhen Coolmay Technology Co., Ltd.
    Juan Guevara
    muy buen trato con el vendedor y muy buena asesoria y el producto está trabajando muy bien ya tiene un año y no he tenido ningún problema
  • Shenzhen Coolmay Technology Co., Ltd.
    Obert Matetakufa
    I'm very happy with the business deal and all the support they are giving . A very good business partner
Contact Person : Joanna
Phone Number : 008613316892240
WhatsApp : +8613316892240

Multistage Speed Operation Three Phase VFD 7.5kw For Pertrolum Machinery

Place of Origin Shenzhen
Brand Name Coolmay
Certification CE
Model Number CM540-5.5/7.5/11KW
Minimum Order Quantity 1 unit
Price Negotiable
Packaging Details Packed with standard carton box
Delivery Time 3-7 work days
Payment Terms T/T, Western Union, MoneyGram
Supply Ability 100,000 set per month
Product Details
Maximum Frequency Vector Control: 0~600Hz | V/F Control: 0~3200Hz Carrier Frequency 0.8kHz~12kHz
Digital Setting 0.01Hz Analog Setting Maximum Frequency ×0.025%
Speed Range 1:200(SVC), 1:1000(FVC) Speed Stability Accuracy ±0.5%(SVC), ±0.02%(FVC)
DC Braking Frequency 0.00Hz~maximum Braking Time 0.0s~36.0s.
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7.5kw Three Phase VFD


0.8kHz Three Phase VFD


7.5kw vfd phase converter

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Product Description

Multistage Speed Operation Three Phase VFD 7.5kw For Pertrolum Machinery

Multistage Speed Operation Three Phase VFD Torque Type Vector Inverter Four Kinds Of Acceleration Or Deceleration Time


The CM540 series is a high torque type vector inverter. Its motor control performance increases obviously. The inverter can implement the control of asynchronous motor and permanent magnet synchronous motor (PMSM), supports multi-kind PG and IO cards(including CAN COMMUNICATION).The function is more powerful. It is used to drive various automation production equipment involving textile, paper-making, machine tool, packing, food, elevator, crane, pertrolum machinery, fan, pump etc.



Model CM540-5.5/7.5/11KW



Weight 3.7kg
Basic Function
Maximum frequency Vector control: 0~600Hz | V/F control: 0~3200Hz
Carrier frequency 0.8kHz~12kHz. The carrier frequency automatically adjusted based on the load features.
Input frequency resolution

Digital setting: 0.01Hz

Analog setting: Maximum frequency ×0.025%

Control mode Open-loop vector control (SVC), Closed-loop vector control (FVC), VF control.
Startup torque G type: 0.25Hz/150% (SVC), 0Hz/180%(FVC), P type: 0.5Hz/100%
Speed range 1:200(SVC), 1:1000(FVC)
Speed stability accuracy ±0.5%(SVC), ±0.02%(FVC)
Torque control precision ±5%(SVC)(above 10Hz), ±3%(FVC)
Overload capacity

G type: 150% rated current 60s. 180% rated current 3s.

P type: 120% rated current 60s. 150% rated current 3s.

Torque boost Automatic torque boost. Manual torque boost 0.1%~30.0%
V/F curve Five modes: Straight-line, Multi-points, Square V/F, V/F separation, V/F Semi-separation
V/F Separation Two modes: complete separation, semi-separation
Ramp mode

Straight-line ramp and S-curve ramp.

Four kinds of acceleration/deceleration time with the range of 0.0–6500.0s

DC injection braking

DC braking frequency: 0.00Hz~maximum, braking time: 0.0s~36.0s.

Braking action current value:0.0%~100.0%

Jog control

Jog frequency: 0.00Hz~50.00Hz

Jog acceleration and deceleration tome:0.0s~6500.0s

Simple PLC, multistage speed operation It implements up to 16 speeds via the simple PLC function or combination of DI terminal states.
Built-in PID It can keep constant output voltage automatically when the mains voltage changes.
Automatic voltage regulation(AVR) Automatically maintain a constant output voltage when grid voltage changes.
Over voltage/Over current loss of speed control Automatic limit of the current and voltage during the operation, prevent frequent over current and over voltage
Rapid current limit Minimizing over-current fault and protect the normal operation of converter.
Torque limit and control "Excavator" characteristics, automatic limit of the torque during the operation, to prevent frequent over-current trip. Closed-loop vector mode torque control can be achieved.


Selection of Braking Package

1. Value of resistance selection of braking resistance

When braking, the recovered energy of motor is expend on braking resistance.

On the basis of U*U/R=Pb;

The U means braking voltage when system brakes stably(different system, different braking voltage. Generally the 380VAC system uses 700v).

Pb----Braking power

2. The selection of braking resistance’s power

In the theory the power of braking resistances same to braking power, but consider the

derate is 70%. We could use this formula:0.7*Pr=Pb*D;

Pr----power of resistance;

D----braking frequency(The regeneration process accounts for the proportion of the whole process);

ElevatorPumping unit-----20%~30%

Uncoil and coil----20 ~30%

Centrifugal machine-------50%~60%

Braking load by accident----5%

General value is 10%.

3. Selection of Braking Package

Note: Table 2-5 is the guide data, according to the actual situation, the user can choose different resistance and power, (the resistance must not be greater than the recommended value in the table, but the power could.). The motor’s power in the practical application system, determine the braking resistor, which have relationship with system inertia, deceleration time, potential energy of the load, the customer should select according to the actual situation. The greater the system inertia, the shorter the time required deceleration, braking the more frequent, the braking resistor should have the greater power and the smaller resistance.

Multistage Speed Operation Three Phase VFD 7.5kw For Pertrolum Machinery 0