Research & Development

Myung-Chi Machinery Co., Ltd. is continuously developing its competitiveness
through a persistent research and development.

R&D /Core Technology

High speed permanent magnet synchronous motor
at its highest efficiency(PMSM)

PM motor of MCB is optimized for high speed rotation,
which provides high efficiency of 98% by minimizing the high frequency loss.

Product Specifications

Output Rotation Speed Number of Poles Insulation rating Cooling system
30~300Hp 15,000~68,000rpm 2 H Air cooling / water cooling (Different by models)

Air bearing

Non-contact bearings that utilize fluid dynamic pressure that occurs automatically
between motor and foil rotating at a high speed, provide a structure with no friction
at all during the operation, which is developed with our unique technology.

Air foil
A non-contact bearing, which supports the load of the rotating body by using a force of an air around the shaft rotating at a high speed, compressed by the wedge effect.
The air bearing type of mcb-Series is non-lube and non-contact, which does not use a lubrication oil, while not causing the malfunction and making the maintenance convenient due to the simple system structure. It maintains the highest efficiency by minimizing the power loss and provides a stable and long life with non-vibratory and noiseless environmentally friendly air bearings.

Product Specifications

Division Lubricant Durability/ Life Maintenance Credibility System Application
Air foil Bearing Not used Semi-permanent None 20 Simple Small device, ACM
TilTing Pad Bearing In use Semi-permanent Check once every 5 years 1 Complicated oil system Industrial device
Ball Bearing In use Semi-permanent Replace after a certain period of operation 1 Aviation engine, Small device


Impellers of mcb Series, manufactured with aerodynamic system technology,
deliver highest durability due to a sophisticated manufacture process.

Optimal design with a precision processing technology
Forged aluminum alloys, suitable for high speed rotation.
Minimized tolerance range with the 5-axis machining.
Verified structural stability of the impeller
by the spin test at rotational speed of 120%.


Eliminates unnecessary energy waste by managing the rotation speed
of the PMSM to control the flow rate requested by the customer.

  • Wide operating range of 45~100%
  • Soft start at the initial start-up
  • Energy savings when load changes
  • Quick load response

Product Specifications

Output Efficiency Switching frequency Output frequency Voltage Cooling method
30kW ~ 300kW 96 ~ 98% 8 ~ 12kHz 800 ~ 1,200Hz 300 ~ 500V Air cooling / water cooling (Different by models)


Provides optimized control system for an automated operation.

PLC applied to a Turbo Blower,
Wide range of operation is available

Wide range of operation methods,
such as intermittent and sensor interlocking operations
Easy to operate (Remote, Local,
and other things are easy to operate)

Setting the interlock of the Turbo Blower
Device protection effect

Alarm and Sub Bov before the occurrence of the surge to prevent it
Alarm in case of problem in temperature, rotation number, and etc.,
through a constant monitoring.

Communication availability with the upper CCR

Modbus TCP/485, H/W communication is available

Protection of the device with the dual system

SMPC dual system is applied

Data Sheet

Understanding the performance curves

The upper and lower limits of pressure/flow rate are applied to each model

Able to operate within the surge point and the overheat line
of the performance map

Inhalation temperature; affected by the humidity

Change in flow rate at the change of discharge pressure.
(If the pressure rises, the flow rate decreases; inversely proportional)

Surge is where the discharging air flows backward, causing the noise/vibration,
while pressure and flow rate is fluctuating rapidly.

TURBO BLOWER Operation Mode

  • Constant flow mode : a control method to maintain a certain value of the flow rate
  • Static pressure : a control method where a certain pressure is divided by a percentage.
  • RPM mode : a control method where a certain rotation number is divided by the percentage.
  • Constant current mode : a control method where a rated current of each model is divided
    by a percentage.

Patent and Certification