China Hot selling Adjusted Speed Brushless DC Synchronous Motor vacuum pump

Product Description

Adjusted Speed Brushless DC Synchronous Motor

Product Brief
E-MAX motor is the special designed permanent magnet synchronous motor based on the IEC norm. E-MAX PMSM will be used for next generation which need more energy saving product. Exceed IE4 variable speed AC motor (IEC60034-30-2-2016).

E-MAX motor is the first generation of CHINAMFG EC motor. E-MAX has led to develop the next generation of technology in motor efficiency and performance.
E-MAX motor contain 2 series:
E-Max commercial
IEC Frame 71 to 90 permanent magnet synchronous motor integrated drive
E-Max Industrial
IEC Frame 71 to 132 permanent magnet synchronous motor

E-Max Commercial series (ECI series)

Model Frame Rated Output Output Maximum
size torque @1500rpm @3000rpm speed
  (Nm)** (kW) (kW) (rpm)
T71ECI01X36 71 1.2 0.2 0.41 3600
T71ECI02X36 2.4 0.41 0.82 3000
T71ECI03X18 3.2 0.55 1800
T90ECI03X36 90 3.2 0.55 1.1 3600
T90ECI05X30 4.8 0.75 1.5 3000
T90ECI07X18 7 1.1 1800

** The rated torque is based on the motor cooling method. The detail torque please see data sheet.
E-Max Commercial Motor Drive Function
CW/CCW chooseStart-stop terminal0-10VDC speed controlRS485 ModbusSpeed hand control by adjustable resistanceSpeed feedback

E-Max Industrial series (EC series)

Model Frame Rated Output Output Maximum
size torque @15000rpm @3000rpm speed
  (Nm)** (kW) (kW) (rpm)
T71EC01X36 71 1.2 0.2 0.41 3600
T71EC02X36 2.4 0.41 0.82 3600
T71EC03X36 3.2 0.55 1.1 3000
T90EC03X36 90 3.2 0.55 1.1 3600
T90EC05X36 4.8 0.75 1.5 3600
T90EC07X36 7 1.1 2.2 3600
T100EC10X36 100 9.5 1.5 3 3600
T100EC14X36 14 2.2 4 3600
T100EC19X30 19.1 3 5.5 3000
T132EC26X30 132 25.5 4 7.5 3000
T132EC35X30 35 5.5 11 3000
T132EC48X30 47.7 7.5 15 3000
T132EC59X30 58.9 9.2 18.5 3000
T132EC70X30 70 11 22 3000

** The rated torque is based on the motor cooling method. The detail torque please see data sheet.

Efficiency class
E-MAX motor has ultra-high efficiency both at full load and light load. The flat efficiency curve can save more energy when the motor drive the fan or pump in CHINAMFG field.
Compare to IE4 motor efficiency class E-MAX

E-Max Commercial series

** System efficiency include the motor and drive efficiency.

E-Max Industrial series

** Efficiency is only motor efficiency.

Model number nomenclature
T  90  EC  03  V  36  C2  B14  P  T1
1   2   3    4  5   6   7    8    9  10

Position Character Description
1 “T” Product platform
2 “90” Frame size: IEC 90#
3 “EC” EC: permanent magnet motor
ECI: permanent magnet motor with integrated drvie
4 “03” Rated torque
5 “V” Cooling method:
G = General purposes, with fan and fan hood. IC411
V = Ventilation applications, without fan and fan hood.
6 “36” Maximum speed: 3600 rpm
7 C2 Power line connection method:
T1 = Terminal box on top
T2 = Terminal box on NDE
C1 = No terminal box, power line from housing
C2 = No terminal box, power line from NDE
8 B14 Mounting method:
B3, B14, B5, B34, B35
9 P P = Slid rail
10 T1 Voltage code:
T1: 3 phase 360-440 V
T2: 3 phase 200-240 V
S1: 1 phase 200-240 V
S2: 1 phase 115 V

VFD consideration
PMSM must drive by the VSD. The motor cannot connect to the normal AC power directly. The VSD can be the commercial drive with vector control or PM motor control mode. VSD need to be set up the correct motor parameter (see below table). The detail parameters can be find in the model data sheet.

Power choose consideration
       The power and torque in above model list is the rated power or torque when the motor has not any cooling method (IC410). If the motor cooled by the wheel or the load the motor power can be larger. The detail running range please see detail model data sheet. Below chart is a sample to decide the power at different cooling condition.


  1. Experienced on the fan, pump, compressor and motion application with permanent magnet motor design
  2. Motor model building and simulation, performance calculation, noise optimization
  3. Motor material database: silicon steel, magnet, copper, aluminum
  4. High precision test equipment and instrument


Manufacturing and quality control

  1. Automatic winding machine to get better consistency
  2. Electrical test equipment
  3. Magnetic flux checking

Customer Application

Customers & Exhibitions


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Application: Universal, Industrial
Operating Speed: Adjust Speed
Magnetic Structure: Permanent Magnet
Function: Driving, Control
Certification: CCC, ISO9001
Brand: DBS
US$ 300/Piece
1 Piece(Min.Order)




dc motor

How does the speed control of a DC motor work, and what methods are commonly employed?

The speed control of a DC (Direct Current) motor is essential for achieving precise control over its rotational speed. Various methods can be employed to regulate the speed of a DC motor, depending on the specific application requirements. Here’s a detailed explanation of how speed control of a DC motor works and the commonly employed methods:

1. Voltage Control:

One of the simplest methods to control the speed of a DC motor is by varying the applied voltage. By adjusting the voltage supplied to the motor, the electromotive force (EMF) induced in the armature windings can be controlled. According to the principle of electromagnetic induction, the speed of the motor is inversely proportional to the applied voltage. Therefore, reducing the voltage decreases the speed, while increasing the voltage increases the speed. This method is commonly used in applications where a simple and inexpensive speed control mechanism is required.

2. Armature Resistance Control:

Another method to control the speed of a DC motor is by varying the armature resistance. By inserting an external resistance in series with the armature windings, the total resistance in the circuit increases. This increase in resistance reduces the armature current, thereby reducing the motor’s speed. Conversely, reducing the resistance increases the armature current and the motor’s speed. However, this method results in significant power loss and reduced motor efficiency due to the dissipation of excess energy as heat in the external resistance.

3. Field Flux Control:

Speed control can also be achieved by controlling the magnetic field strength of the motor’s stator. By altering the field flux, the interaction between the armature current and the magnetic field changes, affecting the motor’s speed. This method can be accomplished by adjusting the field current through the field windings using a field rheostat or by employing a separate power supply for the field windings. By increasing or decreasing the field flux, the speed of the motor can be adjusted accordingly. This method offers good speed regulation and efficiency but requires additional control circuitry.

4. Pulse Width Modulation (PWM):

Pulse Width Modulation is a widely used technique for speed control in DC motors. It involves rapidly switching the applied voltage on and off at a high frequency. The duty cycle, which represents the percentage of time the voltage is on, is varied to control the effective voltage applied to the motor. By adjusting the duty cycle, the average voltage across the motor is modified, thereby controlling its speed. PWM provides precise speed control, high efficiency, and low power dissipation. It is commonly employed in applications such as robotics, industrial automation, and electric vehicles.

5. Closed-Loop Control:

In closed-loop control systems, feedback from the motor’s speed or other relevant parameters is used to regulate the speed. Sensors such as encoders or tachometers measure the motor’s actual speed, which is compared to the desired speed. The difference, known as the error signal, is fed into a control algorithm that adjusts the motor’s input voltage or other control parameters to minimize the error and maintain the desired speed. Closed-loop control provides excellent speed regulation and accuracy, making it suitable for applications that require precise speed control, such as robotics and CNC machines.

These methods of speed control provide flexibility and adaptability to various applications, allowing DC motors to be effectively utilized in a wide range of industries and systems.

dc motor

What role does commutation play in the operation of a DC motor?

In the operation of a DC (Direct Current) motor, commutation plays a crucial role in ensuring the continuous rotation of the motor and the conversion of electrical energy into mechanical motion. It is the process by which the direction of the current in the armature winding is periodically reversed to maintain a constant torque and facilitate the rotation of the motor. Here’s a detailed explanation of the role of commutation in the operation of a DC motor:

Commutation is necessary in a DC motor because the magnetic field generated by the armature winding needs to be constantly aligned with the stator’s magnetic field for efficient torque production. The stator of a DC motor typically consists of permanent magnets or electromagnets that create a fixed magnetic field. The armature winding, located on the rotor, produces a magnetic field that interacts with the stator’s field to generate torque.

The commutation process is achieved through the use of a commutator and brushes. The commutator is a cylindrical ring with multiple segments, while the brushes are conductive contacts that make physical contact with the commutator segments. The armature winding is connected to the commutator, and as the rotor spins, the brushes maintain contact with different segments.

As the rotor rotates, the commutator and brushes ensure that the direction of the current in the armature winding is reversed at specific intervals. This reversal of current flow is necessary to maintain a consistent torque in the same rotational direction. Without commutation, the torque generated by the motor would fluctuate in both magnitude and direction, leading to instability and erratic motor behavior.

The commutation process involves two stages: mechanical commutation and electrical commutation.

1. Mechanical Commutation: As the rotor rotates, the brushes make contact with different segments of the commutator. The segments are insulated from each other to prevent short circuits. When the brushes move from one segment to another, the current flowing through the armature winding is switched to a different coil or set of coils. This mechanical switching ensures that the magnetic fields produced by the winding are properly aligned with the stator’s field, resulting in continuous torque production.

2. Electrical Commutation: The reversal of current in the armature winding is achieved through electrical commutation. When the brushes make contact with a new commutator segment, the current flow in the winding is redirected to maintain the desired torque direction. The timing and sequence of the current reversal are critical to ensure smooth and efficient motor operation.

The commutation process in a DC motor is a dynamic and continuous operation. It allows for the conversion of electrical energy into mechanical motion by providing a consistent torque output. The efficiency and performance of the motor are greatly influenced by the quality and effectiveness of the commutation process.

In summary, commutation plays a vital role in the operation of a DC motor by ensuring the continuous rotation of the motor and the production of consistent torque. It involves the mechanical and electrical switching of the current direction in the armature winding, facilitated by the commutator and brushes.

dc motor

Are there safety considerations or maintenance practices associated with DC motors?

Yes, there are safety considerations and maintenance practices associated with DC (Direct Current) motors. DC motors, like any other electrical equipment, require proper handling, maintenance, and adherence to safety guidelines to ensure safe operation and longevity. Here’s a detailed explanation of the safety considerations and maintenance practices associated with DC motors:

Safety Considerations:

Electrical Hazards: DC motors operate with high voltages and currents, posing electrical hazards. It is essential to follow proper electrical safety practices, such as wearing appropriate personal protective equipment (PPE) and ensuring that electrical connections are secure and insulated. Proper grounding and isolation techniques should be employed to prevent electrical shocks and accidents.

Lockout/Tagout: DC motors, especially in industrial settings, may require maintenance or repair work. It is crucial to implement lockout/tagout procedures to isolate the motor from its power source before performing any maintenance or servicing activities. This ensures that the motor cannot be accidentally energized during work, preventing potential injuries or accidents.

Overheating and Ventilation: DC motors can generate heat during operation. Adequate ventilation and cooling measures should be implemented to prevent overheating, as excessive heat can lead to motor damage or fire hazards. Proper airflow and ventilation around the motor should be maintained, and any obstructions or debris should be cleared.

Mechanical Hazards: DC motors often have rotating parts and shafts. Safety guards or enclosures should be installed to prevent accidental contact with moving components, mitigating the risk of injuries. Operators and maintenance personnel should be trained to handle motors safely and avoid placing their hands or clothing near rotating parts while the motor is running.

Maintenance Practices:

Cleaning and Inspection: Regular cleaning and inspection of DC motors are essential for their proper functioning. Accumulated dirt, dust, or debris should be removed from the motor’s exterior and internal components. Visual inspections should be carried out to check for any signs of wear, damage, loose connections, or overheating. Bearings, if applicable, should be inspected and lubricated as per the manufacturer’s recommendations.

Brush Maintenance: DC motors that use brushes for commutation require regular inspection and maintenance of the brushes. The brushes should be checked for wear, proper alignment, and smooth operation. Worn-out brushes should be replaced to ensure efficient motor performance. Brush holders and springs should also be inspected and cleaned as necessary.

Electrical Connections: The electrical connections of DC motors should be periodically checked to ensure they are tight, secure, and free from corrosion. Loose or damaged connections can lead to voltage drops, overheating, and poor motor performance. Any issues with the connections should be addressed promptly to maintain safe and reliable operation.

Insulation Testing: Insulation resistance testing should be performed periodically to assess the condition of the motor’s insulation system. This helps identify any insulation breakdown or degradation, which can lead to electrical faults or motor failures. Insulation resistance testing should be conducted following appropriate safety procedures and using suitable testing equipment.

Alignment and Balance: Proper alignment and balance of DC motors are crucial for their smooth operation and longevity. Misalignment or imbalance can result in increased vibrations, excessive wear on bearings, and reduced motor efficiency. Regular checks and adjustments should be made to ensure the motor is correctly aligned and balanced as per the manufacturer’s specifications.

Manufacturer’s Recommendations: It is important to refer to the manufacturer’s guidelines and recommendations for specific maintenance practices and intervals. Each DC motor model may have unique requirements, and following the manufacturer’s instructions ensures that maintenance is carried out correctly and in accordance with the motor’s design and specifications.

By adhering to safety considerations and implementing proper maintenance practices, DC motors can operate safely, reliably, and efficiently throughout their service life.

China Hot selling Adjusted Speed Brushless DC Synchronous Motor   vacuum pump	China Hot selling Adjusted Speed Brushless DC Synchronous Motor   vacuum pump
editor by CX 2024-04-26