Three phase synchronous or asynchronous

Grease packed or oil lubricated

Semi-hermetic sealing

20 to 100 krpm

DBS ‘M’ Series High-Speed Motors and Generators

2

DBS ‘M’ Series Motors and

Generators Fields of Application

High speed rotating machinery of all types especially where

direct overhang of driven or driving components is required.

The M series is equally suitable for motor or generator

applications. The motors are sealed and can be operated at

pressure or vacuum as standard.

Design

High power density and high speed capability with liquid

cooling and grease lubricated ball bearings as standard.

All machines exceed IE4 [Super premium efficiency] as per

EU motor efficiency standard IEC/EN 60034-30-1: 2014.

All machines are IP54 rated (up to IP67 on request).

3 ph, permanent magnet or induction machines are available.

Proprietary VFD drives available from a number of suppliers

to suit customer compliance requirements.

Proprietary front flange with captive ‘O’ ring seal provides

precise, concentric location.:

Special Customer Requirements

Where rotational speed, power or other operational

requirement fall outside our normal range of machines, DBS

will be pleased to quote for bespoke designs.

Operating Range

See page 4 for full operating range and performance graphs.

Nominal Power: 1-150kW

Nominal Speed: 20-100kRPM

Operating temperature: -60/+70°C

Motor body operating pressures up to 40 barg (580psi)*

* Dependant on the compatibility of working fluid of the driven machine with the

internals of motor and lubricant.

Keyed shaft end provided

as standard. Special shaft

ends to suit customer

requirements available on

request.

Super precision, angular

contact ball bearings

support magnetic rotor and

overhung driven

components. Bearings can

be sized to withstand

substantial radial and axial

loads to meet customer

requirements.

Integrated terminal box

includes stud terminals for

all power and sensor

connections.

1

2

3

3

DBS standard flange face provides

accurate location concentric and square

with rotor shaft. Incorporates captive ‘O’

ring seal rated to body design pressure.

Water, oil or glycol

cooling to remove

stator heat.

4

5

3

2

1

4

M –SER

IES

5

4

Terminal Box

An integrated terminal box has

been included which is

designed for EMC compliance

The box contains: side

mounted, pressure rated lead

through terminals for power,

bearing temperature and stator

temperature connections;

optional accelerometer;

optional once per rev speed

sensor; optional DIN rail

terminals fitted for external

connection to inverter and

other control equipment.

Bearings

Different applications require

different bearings due to varying

end loads. For this reason, we

have several top end designs for

each of our motor sizes and can

design bespoke solutions.

In applications where the motor

lubricant must be isolated from

the working fluid of the driven

machine, an air or inert gas

blown seal can be supplied.

Mechanical Features

M –SERIES

5

Variable Frequency Drives (VFD)

High-speed machines require specialist drives

to maximise the motor’s performance, and

avoid excess heat generation which can

damage the motor.

Over several years of development, we have

identified a small selection of inverters from

two major industrial suppliers that work

efficiently at frequencies well above 600 Hz.

These drives are specifically tuned and

commissioned with our motors.

Electrical Features Sine wave filters

Sine wave filters are used to convert the

output signal of the VFDs to a smooth

sinewave shape. These eliminate unwanted

harmonics and reduces voltage and current

ripples in the motor.

This is advantageous for many reasons: it

significantly improves the life span of the

motor; reduces current harmonics on the

rotor, keeping the rotor cooler; improves the

power factor; reduces iron losses in the

stator; and reduces acoustic noise of the

motor.

For high speed applications where the

inverter switching frequency should be above

12 kHz, a sine wave filter is required to

improve the system efficiency and protect the

motor against voltage and current ripples.

DBS has a range of custom made sine wave

filter for the motors it designs.

EMC filters

To comply with IEC 610000 Electromagnetic

compatibility standard, EMC Filters are used.

These are employed to minimise the amount

of radio interference on the mains and other

electronic equipment close by as well as

protecting other connected equipment.

DBS employs a range of EMC filters matching

the high speed drives supplied.

Before Voltage After

Current

M –SERIES

6

Performance Curves

Selection Chart

The table below shows the range of powers and speeds

that we offer. Standard frame sizes and/or machine

properties can be adjusted to suit customer

requirements. The examples are there to show

indicative lengths. Please note: All values are indicative,

it is possible to exceed powers and speeds in certain

cases. Please direct enquiries to

enquiries@dynamicboost.com

M –SERIES

Frame Size** Rated Power

Range [kW]

Maximum Speed [rpm] Example Rating

Dimensions [mm]

Grease Oil A B C*

M80 1 - 10 75,000 110,000

2.35kW @110kRPM

80 h6 117

165

3.5kW @110kRPM 175

4.7kW @100kRPM 190

6.3kW @90kRPM 210

M125 5 - 30 55,000 75,000

10kW @75kRPM

125 h6 195

246

16kW @68kRPM 260

21kW @60kRPM 280

29kW @55kRPM 300

M170 10 - 60 45,000 70,000

12kW @60kRPM

170 h6 249

240

20kW @50kRPM 265

27kW @45kRPM 290

35kW @45kRPM 330

M240*** 30 - 150 30,000 45,000

55kW @50kRPM

240 h6 353

320

85kW @45kRPM 345

105kW @40kRPM 380

125kW @40kRPM 400

*Length dimension C has been provided for water cooled motors, air cooled versions are also available.

** Special custom sizes such as M60 & M100 available upon request. *** Custom larger motors are also available upon request.

Typical performance curves for our synchronous and asynchronous machines are shown

below. A set of performance curves and equivalent circuit are supplied with each quotation.

Asynchronous/Induction 35 kW, 50kRPM Synchronous/Permanent Magnet 25 kW, 50kRPM

7

Order Code & Scope of Supply

M –SERIES

Order Code Example: M80-S2-7-60-CVG-12-1-12-AAB

The scope of supply would be: M series motor/generator; DBS 80 frame size; synchronous; 2-pol; 7kW;

60kRPM; 400 V motor nominal voltage; vertical mount; grease packed bearings; 12 mm single angular contact

front locating bearing; M20 conduit connection ; 1/2” BSPF threaded cooling connections; no customer options

Motor Series

M—Standard

Orientation

H—Horizontal

V—Vertical Lubrication

G—Grease

O—Oil

Front Locating Bearing

A—Spring Preload Single

Angular Contact

B— Spring Preload Double

Angular Contact

C— Solid Preload Double

Angular Contact

D— Customer specified

design

Electrical Conduit

Thread

A—M20

B—M25

C—M32

D—PG13.5

E—PG21

F—PG29

G— Customer

specified design

Cooling

Connections

A—3/8” BSPF

B—1/2” BSPF

C—3/4” BSPF

D—1/2” BSPT

E—3/4” BSPT

F—Customer

Front

Bearing

Size

Nominal

Power (kW)

Nominal

Speed (kRPM)

Nominal

A—220V

B—380V

C—400V

D—500V

E—660V

F—690V

G—Customer

specified design

A V G 12 A 15 30 A B

Frame Size

80

125

170

240

Type

S—Synchronous/

Permanent Magnet

A—Asynchronous/

Induction

S M 80 - - - - - - 2

Number of

2

4

6

XXX -

Optional

Customer

Specific

Code

8

This document is for informational purposes only and should not be considered as a binding description of the products or their performance in all applications. The performance data in this document depicts typical performance under controlled conditions. Actual performance may vary depending on the operating environment and application. Contact DBS to confirm suitability of the product for your application.

Head Office: Dynamic Boosting Systems,

10 Canbury Business Centre

Elm Crescent

Kingston upon Thames,

Surrey, KT2 6HJ

United Kingdom

Phone:+44 (0) 20 3417 4686 / +44 (0) 20 8546 6372

Email: enquiries@dynamicboost.com

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