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PWM-IGBT Based Static Stabilizer
Launched upto 100 KVA
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Approved supplier
to Ministry of Defense
& Urban Development,
Government of
Sri Lanka

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Small Motors & Gear box

Motor

Motor converts electrical energy to mechanical energy (rotational energy).
It has low noise and vibration.

Motor's input voltage: 110V 50/60Hz; 220V 50/60Hz; 380V 50/60Hz and 440V 50/60Hz

Type of motor can classify by two

  • Single-phase motor : a condenser to be connected to the auxiliary coil to operate the motor
  • Three-phase motor : due to three electrical source with a phase offset of 120 degree in voltage, no condenser is necessary. The motor efficiency is high and the torque is also relatively big

Functionally, the motor can be grossly divided into three types as follow

  • Motor of constant speed
  • Induction Motor
  • 2-pole Induction Motor
  • Reversible Motor
  • Motor with brake
  • Electro-magnetic Brake Motor
  • Clutch & Brake Motor
  • Motor with Speed Controller
  • Socket type speed controller
  • Unit type speed controller (built-in V.R)
  • Unit type speed controller (Separate V.R)

Ease to use

  • It is easy to obtain source power simply by connecting a condenser to the commercial power.
  • Since the condenser is not need for a three-phase electrical source.

Gear Head

As a speed changer uses a gear, the gearhead is an instrumental device that does not only reduce the revolution of motor to its necessity but also provides a greater torque

There are two types of Gearhead:
  • Parallel Gearhead: Spur Gear, Helical Gear etc.
  • Worm Gear: Solid and hollow

Characteristics of Gearhead are

  • Small size with big delivery capability
  • Fixed reduction ratio by non-slip
  • Durability
  • Wide Spectrum of reduction ratio

Gear Ratio

  • The gear ratio in the engaging gears is a value obtained by dividing the number of teeth in the driven gear by the number of teeth in the driving gear
  • DKM has various types of gearhead, including delicated gearhead 2~250
  • If a ratio is greater than 250 use Inter decimal gearhead

DKM gearhead are available from 70mm, 80mm and 90mm depending on the exterior size
Brochure

Constant Speed Motors

  • Induction motor
  • Reversible motor
  • Electro magnetic brake motor
  • Clutch / Break motor
  • DC Motor
  • Torque motor
  6W to 200KW
6W to 180W
6W to 200W
15W to 120W
12V, 24V, 90V
6W to 70W
     

Speed Control Motors

  • Induction Motor
  • Reversible motor
  • Break motor
  • Clutch / Break
  • Speed controller
  6W to 180W
6W to 180W
15W to 180W
15W to 120W
Digital and Analog
     

Gear Heads

Parallel Gear head
  • G-Type
  • P-Type
  • H-Type
  Gear Ratio : 2 to 360
Gear Ratio : 2 to 180
Gear Ratio : 3 to 180
Worm Gear Head
  • Solid
  • Hollow
  Gear Ratio : 10 to 60
Gear Ratio : 7.5 to 60
For detailed absolute values on technical specifications read the brochure guide.
However, read the motor specifications as per following definitions:

Output Power The amount of work that can be performed in a given period of time. It can be used as a criteria for motor capability.
Current The current value used by a motor when the motor is producing rated torque.
Starting Torque This term refers to the torque generated the instant the motor starts.If the motor is subjected to a friction load smaller than this torque, it will operate.
Rated Torque This is the torque created when the motor is operating most efficiently. Though the maximum torque is far greater,rated torque should, from the stanpoint of utility, be the highest torque
Rated Speed This is the speed of the motor when the motor is producing rated torque
Permissible Overhung
Load
The value shown in the table above is the value for the permissible overhung load. Permissible overhung load is the permissible value of the load applied in a direction perpendicular to the gearhead output shaft.
Permissible Thrust
Load
As shown in the figure above, this term refers to the permissible value of load applied in the axial direction to the gearhead output shaft. Keep the thrust load to no more than half the motor weight.

Item Specifications
Insulation Resistance 100 or more when 500 VDC is applied between the windings and the frame after rated motor operation under normal ambient temperature and humidity.
Dielectric Strength Sufficient to withstand 1.5 KV at 50 Hz and 60 Hz applied between the windings and the frame for 1 minute after rated motor operation under normal ambient temperature and humidity.
Temperature Rise Temperature rise of windings are 80 (144 ) or less measured by the resistance change method after rated motor operation with connecting a gearhead or equivalent heat radiation plate. [ Three-Phase 6W type : 70 (126 ) ]
Insulation Class Class B [ 130 (266 ) ]
Overheat Protection Operating temperature,
open : 130 5 (266 9 ) close : 82 15 (179.6 27 )
Ambient Temperature Range -10 ~ + 40 (14 ~ 104 ) [ Three-phase 200VAC : -10 ~ +50 (14 ~ 122 ) ] (nonfreezing)
Ambient Humidity 85% maximum (noncondensing).
Type   Motor Model Gear Ratio
        36 2 3 3.6 5 6 7.5 9 10 12.5 15 18 20 25 30
PARALLEL
TYPE
G TYPE 6W, 10W 7GBDBMH o x o o o o o o x o o o x o o
15W, 25W 8GBKBMH o x o o o o o o x o o o x o o
40W 9GBKBMH o o o o o o o o o o o o x o o
P TYPE 60W ~ 200W 9PBKBH o o o o o o o o x o o o o o o
9PFKBH o o o o o o o o x o o o o o o
H TYPE 90W ~ 200W 9HBKBH o x o o x o x o x o o o x o o
WORM
TYPE
SOLID 25W ~ 60W 8/9WDBL o x x x x x x x o o (12) o o x o o
8/9WDBR o x x x x x x x o o (12) o o x o o
HOLLOW 60W ~ 200W 9WHD x x x x x x o x o x o x o o o
Type   Motor Model Gear Ratio
        40 50 60 75 90 100 120 150 180 250 300 360
PARALLEL
TYPE
G TYPE 6W, 10W 7GBDBMH o o o o o o o o o x x x
15W, 25W 8GBKBMH o o o o o o o o o o o o
40W 9GBKBMH o o o o o o o o o x x x
P TYPE 60W ~ 200W 9PBKBH o o o o o o o o o x x x
9PFKBH o o o o o o o o o x x x
H TYPE 90W ~ 200W 9HBKBH x o o o o o o o o x x x
WORM
TYPE
SOLID 25W ~ 60W 8/9WDBL x o o x x x x x x x x x
8/9WDBR x o o x x x x x x x x x
HOLLOW 60W ~ 200W 9WHD o o o x x x x x x x x x
  • Suitable for continuous operation
  • For reversible operating time 30 minutes
  • 1- 4 times overrun for electromagnetic brake motor
  • High frequency operation for clutch and break motor
  • Stable torque during stall condition for torque motor
  • High Efficiency > 94%
  • High Ratio up to 400:1
  • Low backlash 10 Arcmin
  • High Torque up to 320Nm

  • Mounting pl
  • Extension Cable
  • Fan

Motor

Belt conveyor
T = (½ D) x [(µW + Fr).9.81] / η (N.m)
D: Drum Diameter (meter)
µ: Friction Coefficient
Fr: Friction Force (Kg.f)
W: Work Load (Kg. f)
η: Machine Coefficient
Driving ball screw
T = [(BP/2Πη) x (μW + Fr).9.81] (N.m)
BP: Pitch of Ballscrew
η: Machine coefficient
μ: Friction Coefficient
W: ass of moving Part
Fr: Friction force
Moving Horizontally
T = (½ D) x µW x.9.81 (N.m)
D: Drum Diameter (meter)
µ: Friction Coefficient
W: Work Load (Kg. f)
Operation inertia mass
T = [(GD²/37500) x (N/t)].9.81] (N.m)
GD²: Disk Wheel effect (Kg.f .m²)
N : Revolutions per minute (rpm)
t : Time (sec)
Rolling up a load
T = (½ D) x W x 9.81 (N.m)
D: Drum Diameter (meter)
W: Work Load (Kg.f)
 

Gear head

For the directly assembled gearhead, the number of rotation is expressed by the following equation.

NG = NM / I
NG: Revolution of a gearhead (rpm) 
NM: Revolution of a motor (rpm) 
i: Gear Ratio of a gearhead

The output torque when the gearhead is combined that is calculated as follows equation.

TG = TM x i x η
TG: Torque of a gearhead's output
TM: Torque of a motor
i: Reduction ratio of a gearhead
η: Delivery efficiency of a gearhead

Overhung load and thrust load   In case of using chain, gear, belts, transmitting tools in gearhead output.