PERMANENT MAGNET (Self Holding) SOLENOIDS · PDF filePERMANENT MAGNET (Self Holding) SOLENOIDS...

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PERMANENT MAGNET (Self Holding) SOLENOIDS1. Design and Features

The permanent magnet solenoids (also known as mag-

netic latching or self holding solenoids) is a product

line of linear open frame solenoids that utilize the ad-

vantages of a high performance permanent magnet.

The principle of operation is similar to all linear

solenoids. When the coil is energized, the plunger

moves toward the pole piece. The advantage of the PM

solenoid is that once energized and plunger movement

has occurred, the plunger will remain in the energized

position without any further electrical power input.

This “holding” feature is accomplished because the

permanent magnet creates a magnetic latching field

that maintains the plunger in the closed or energized

position. There are two types of PM solenoid configu-

rations : one is a single direction holding design and the

other is a two direction holding design. The one direc-

tion design uses a PM to hold the solenoid in the ener-

gized position, Fig 1. The two direction design uses a

PM that can hold the enclosed plunger in two different

positions at both ends of the stroke. This is effected by

the use of two separate coils and pole pieces, Fig 2.

2. Stroke, Force and Holding Force

The PM type solenoids can be used in both short and

long stroke applications. As such, the pole piece

designs are both conical and flat depending upon the

performance requirements. To improve efficiency, the

solenoid stroke should be minimized in the application.

3. Operational Considerations

A) Temperature

The coil data for the permanent magnet solenoid shows

the values at ambient temperature 20°C and a duty

cycle of 25% (SH2LC0524 is duty cycle 10%). The

solenoid coil can operate at temperatures up to 105˚C.

Most applications using PM solenoids are intermittent

applications (as the permanent magnet is used for

holding). Please note the maximum on time to pre-

vent potential thermal damage.

B) Operation

The PM solenoid is different than traditional solenoids,

in that electrical polarity is important to obtain proper

operation. The lead wires from the coil are color coded

and must be wired to the appropriate electrical connec-

tions (plus and minus terminals). With current flowing

in one direction (when energizing the solenoid) the

coils magnetic field and the permanent magnet field are

additive. To release the solenoid from the “hold” position,

the coil field has to cancel the permanent magnet field,

thus current has to flow in the opposite direction to the

pull in current flow.

C) Return Spring

In a one direction design it is advantageous to use a

return spring to prevent inadvertent plunger “pull in”

that could be caused by the magnetic field from the

permanent magnet.

D) Plunger and Shaft Modifications

It is not recommended that the customer modify the

plunger or shaft, as the shafts are manufactured and

plated at the factory. Any special configurations can be

supplied. Please consult the factory for details.

E) Handling

The permanent magnet solenoid utilizes a permanent

magnet that will attract metal particles and care must

be taken to prevent these particles from becoming

“attached” to the solenoid.Fig. 2 Two Direction

Fig. 1 One Direction

87

Permanent M

agnet(Self Holding) Solenoids

www.shindengen.co.jp/smt/

PERMANENT MAGNET (Self Holding) SOLENOIDSF) Installation of Solenoid

The PM type solenoid uses tapped holes for mounting

in the frame.

Caution needs to be observed that the mounting screws

used to attach these solenoids are the correct length so

as not to damage the coil.

4. General Characteristics

Insulation class Class A (105°C)

Lead wire class A (105°C)

Dielectric strength AC l000V 50/60 Hz 1 min.

(at normal temperature and

normal humidity)

Insulation resistance More than 100 Mohm at DC

500V megger

(at normal temperature and

normal humidity)

Expected life 200,000 cycles

(Solenoid cycle life is very dependent upon side load,

frequency of use, and environmental conditions.

Cycle life tests should be performed by the customer.)

5. How to Select a Solenoid

Before selecting a permanent magnetic solenoid, the

following information must be determined :

A) Attraction Force and Holding Force

The actual force required for both “pull in” and “hold-

ing” in the application should be increased using a safety

factor multiplier of 1.5 to arrive at the force value that

should be used in your specification.

B) Duty Cycle

Most applications using PM solenoids are intermittent

applications (as the permanent magnet is used for hold-

ing), the duty cycle for each solenoid is shown in the

catalog. Please note the maximum on time to prevent

potential thermal damage.

C) Stroke

The stroke for a one direction PM solenoid is deter-

mined by application requirements. For a two direction

PM solenoid the stroke is determined by the solenoid

selected.

D) Operating Voltage

Operating DC voltage is determined by the application

and voltage available.

After determining these specifications, one can find the

correct size solenoid for the application, using the

force-stroke characteristic tables and graphs. The coil

data is also shown for different sizes of magnet wire. If

the exact operating voltage is not in the coil data table,

please consult the factory for details. Note: In a one

direction PM solenoid, to “release” the PM field so that

the plunger can return to the de-energized position the

appropriate level of reverse current must be applied to

the coil. The data for this “release” current is shown in

the coil data given for each size solenoid.

To determine the force output of the solenoid after

temperature rise, please use the amp-turn force graphs

(page 112) after calculating the amp-turns.

6. Ordering Information

When ordering a permanent magnet solenoid, the

correct part number needs to be determined, from

the catalog information.

Example of a complete part number.

SHILC0524-06 (One direction holding, conical face

type and 6V coil)

SH2LC0730-12 (Two direction holding, conical face

type and 12V coil)

7. Labeling

For permanent magnet solenoids the part number

labeling is as follows:

A) Standard Solenoid (no modifications).

The solenoid label will have the part number and

the date code (which identifies the year and week of

manufacture).

Example : SHILC0524-06 9401

Solenoid Size (Type No.)

Date Code (year and week)

B) Special Configuration (required for any modifica-

tion to a standard design)

Any change from the standard catalog design

requires that a custom part number be assigned,

which will also include the date code of manufacture.

Example : M94015SH 9401

Special Part Number

Date Code (year and week)


SH1LC0524,SH1LF0524 PERMANENT MAGNET SOLENOID UNIT : mm

SHOWN ENERGIZED

1.5±

0.1

2.5±0.2

6±0.3

10±0.3

24±0.5

9±0.2

6±0.2

t16±0.2

5±0.

2

12±

0.5

（0.5）

φ2±0.1

12.5±0.5

φ5±

0.1

2-M2×P0.4

LEADS 250MIN.

(UL1007 AWG28)

(WHITE & BLACK)

COIL DATA without heat sink

“on” timeduty cycle= 100% “on” time + “off” time

25%or less

releasecurrent

(reference)

MAX. “on” time in seconds 5

watts at 20˚C 8.4

ampere-turns at 20˚C 452

type no. resistanceΩ±10%(at 20˚C) no. turns volts DC ampere

SH1LC0524-06SH1LF0524-06 4.3 340 6 360mA

SH1LC0524-12SH1LF0524-12 17.1 630 12 200mA

SH1LC0524-24SH1LF0524-24 68.6 1260 24 100mA

WEIGHT : 14gPLUNGER: 3.3g

DRIVE CIRCUITS

(WHITE)

(BLACK)

RDCV

RELEASE

OPERATE

OPERATE

RELEASE

SOLENOID

0 5 64321

1

0.5

0.1

0.05

0.03

5

1

0.5

0.1

0.05

0.02

657

0 5 64321

HOLDING FORCE1.90MIN.(MAGNET ONLY)

MAGNET ONLY

21W

8.4W

2.1W

4.2W


MAGNET ONLY

21W

8.4W

2.1W

4.2W

MAGNET ONLY

21W

8.4W

2.1W

4.2W

MAGNET ONLY

21W

8.4W

2.1W

4.2W

AT20°C AT20°C

FOR

CE

[N]

FOR

CE

[N]

STROKE [mm] STROKE [mm]STROKE-FORCE(F)STROKE-FORCE(C)

25%25% 25%25%

89

Permanent M




SHOWN ENERGIZED

17±

0.5

3±0.2

10±0.3

15±0.3

30±0.5

12±0.2

6±0.2

t1.27±0.2

8±0.

2

2±0.

1

（0.6）

φ2.5±0.1

19±0.5

φ7±

0.1

2-M3×P0.5

LEADS 250MIN.

(UL1007 AWG26)

(WHITE & BLACK)



25%or less

releasecurrent

(reference)


watts at 20˚C 9.6



SH1LC0730-06SH1LF0730-06 3.8 385 6 650mA

SH1LC0730-12SH1LF0730-12 15 780 12 320mA

SH1LC0730-24SH1LF0730-24 60 1530 24 160mA

WEIGHT : 38gPLUNGER: 9.2g

DRI E CIRC ITS

(WHITE)

( LACK)

RDC

RELEASE

O ERATE

O ERATE

RELEASE

SOLENOID

0 5 64321

5

0.5

1

0.1

10 10

5

1

0.5

0.04

0.1

3020

0 5 64321


MAGNET ONLY


MAGNET ONLYMAGNET ONLY

24W

9.6W

2.4W

4.8W

24W9.6W

2.4W

4.8W

24W

9.6W

2.4W

4.8W

24W9.6W

2.4W

4.8W

MAGNET ONLY

AT20°C AT20°C

FOR

CE

[N]

FOR

CE

[N]


25%25%25%25%



SHOWN ENERGIZED

3±0.

1

4±0.2

10±0.3

23±0.3

40±0.5

9±0.2

14±0.2

t2

8±0.

2

8±0.2

（0.7）

φ3±0.1

2-φ2.6±0.1

24±0.5

26.5

±0.

5

φ11±

0.1

2-M3×P0.5 LEADS 250MIN.

(UL1007 AWG26)

(WHITE & BLACK)



25%or less

releasecurrent

(reference)


watts at 20˚C 17.6



SH1LC1140-06SH1LF1140-06 2.1 340 6 1060mA

SH1LC1140-12SH1LF1140-12 8.2 640 12 560mA

SH1LC1140-24SH1LF1140-24 32.7 1360 24 260mA

WEIGHT : 120gPLUNGER: 28g

DRI E CIRC ITS

(WHITE)

( LACK)

RDC

RELEASE

O ERATE

O ERATE

RELEASE

SOLENOID

0 5 8764321

10

5

1

0.5

0.1

100

50

10

5

1

0.5

0.2

50

0 5 86 74321


MAGNET ONLY



44W

17.6W25％

4.4W8.8W

44W

17.6W25％

4.4W8.8W

44W

17.6W

4.4W8.8W

44W

17.6W

4.4W8.8W

MAGNET ONLY

AT20°C AT20°C

FOR

CE

[N]

FOR

CE

[N]


25%25%

91

Permanent M




SHOWN ENERGIZED

3±0.

1

4±0.2

10±0.3 40±0.5

9±0.2

13±0.2

t215

±0.

2

8±0.2

（0.7）

φ3±0.1

25±0.5

25±0.5

29.5

±0.

5

φ12±

0.1

4-M3×P0.5LEADS 250MIN.

(UL1007 AWG24)

(WHITE & BLACK)



25%or less

releasecurrent

(reference)


watts at 20˚C 18.4



SH1LC1240-06SH1LF1240-06 2.0 320 6 1620mA

SH1LC1240-12SH1LF1240-12 7.8 630 12 820mA

SH1LC1240-24SH1LF1240-24 31.3 1315 24 400mA


DRIVE CIRCUITS

(WHITE)

(BLACK)

RDCV

RELEASE

OPERATE

OPERATE

RELEASE

SOLENOID

0 5 8764321

10

5

1

0.5

100

50

10

5

1

0.5

7050

0 5 76 84321


MAGNET ONLY

44W

4.4W

46W

4.6W

9.2W

MAGNET ONLY



44W

4.4W

46W

18.4W

4.6W

9.2W

AT20°CAT20°C

FOR

CE

[N]

FOR

CE

[N]

STROKE [mm] STROKE [mm]STROKE-FORCE(C) STROKE-FORCE(F)

18.4W18.4W25%25% 18.4W18.4W

25%25%


SH2LC0524 PERMANENT MAGNET SOLENOID UNIT : mm

PULL COIL PUSH COIL

SHOWN ENERGIZEDPOSITION WHEN A VOLTAGEIS APPLIED TO PUSH COILSTROKE: 2mm±0.2

STROKE

7±0.35±0.3

10±0.3

24±0.5

6±0.2

2±0.2

9±0.2

t1

5±0.

2

12±

0.5

（0.5）

φ2±

0.03

φ2±

0.03

2-M2×P0.4

LEA

DS

250

MIN

.

(UL1007 AWG28)(UL1007 AWG28)

(WHITE & BLACK)(RED & BLACK)



10%or less


watts at 20˚C 13


type no. resistanceΩ±10%(at 20˚C) no. turns volts DC

SH2LC0524-06 2.8 166 6

SH2LC0524-12 11.1 345 12

SH2LC0524-24 44.3 670 24


(WHITE)

( LACK)

(RED)

( LACK)

DC LLCOIL

SHCOIL

DRI E CIRC ITS

AT20°C

FOR

CE

[N]

STROKE [mm]STROKE-FORCE (C)

10％13W10％13W10％

0 21.60.4 0.8 1.2

0.3

0.4

0.6

0.81

5

3

HOLDING FORCE1.5ＮMIN.(MAGNET ONLY)

93

Permanent M




12±0.3

9±0.3

3±0.3

15±0.3

30±0.5

8±0.214±0.2

t1.2

8±0.

2

17±

0.5

（0.5）

φ2.5

±0.

03

φ2.5

±0.

03

2-M3×P0.5

LEA

DS

250

MIN

.

(UL1007 AWG26)(UL1007 AWG26)


PULL COIL PUSH COIL

STROKE




10%or less


watts at 20˚C 8



SH2LC0730-06 4.5 285 6

SH2LC0730-12 18 540 12

SH2LC0730-24 72 1100 24


5

1

0.5

10

0 3 421

20W

8W25％

20W

8W25％


AT20°C

STROKE [mm]STROKE-FORCE (C)

FOR

CE

[N]

(WHITE)

( LACK)

(RED)

( LACK)

DC LLCOIL

SHCOIL

DRI E CIRC ITS



PULL COIL PUSH COIL


15±0.311±0.3

4±0.3

23±0.3

40±0.5

10±0.220±0.2

t2

12±

0.2

26.5

±0.

5

（0.5）φ3.5

±0.

03

φ3.5

±0.

03

4-M3×P0.5

LEA

DS

250

MIN

.

(UL1007 AWG26)(UL1007 AWG26)


STROKE



10%or less


watts at 20˚C 16



SH2LC1140-06 2.3 265 6

SH2LC1140-12 9 525 12

SH2LC1140-24 36 1025 24


(WHITE)

(BLACK)

(RED)

(BLACK)

DCV PULLCOIL

PUSHCOIL

DRIVE CIRCUITS

10

1

5

0.5

20

0 54321

HOLDING FORCE3.5ＮMIN.(MAGNET ONLY)

40W

16W25％8W

4W

40W

16W25％8W

4W

AT20°C

FOR

CE

[N]

STROKE [mm]STROKE-FORCE(C)

95

Permanent M



0 1 2 3 4 5 6 7STROKE [mm]

DUTY CYCLE 10%

FORCE

[N]

0.07

0.1

0.5

1

10

5

50

100

SH1LC1240SH1LC1140SH1LF1240SH1LF1140

SH2LC1140

SH2LC0730 SH1LC0730

SH1LF0730

SH1LF0524

SH2LC0524

SH1LC0524

0 1 2 3 4 5 6 7STROKE [mm]

DUTY CYCLE 25%

FORCE

[N]

0.07

0.1

0.5

1

10

5

50

100


SH2LC1140

SH2LC0730 SH1LC0730

SH1LF0730

SH1LF0524SH1LC0524

SH2LC1140

SH2LC0730 SH1LC0730

SH1LF0730

SH1LF0524

SH2LC0524

SH1LC0524

SH2LC1140

SH2LC0730 SH1LC0730

SH1LF0730

SH1LF0524SH1LC0524

0 1 2 3 4 5 6 7STROKE [mm]

DUTY CYCLE 50%

FORCE

[N]

0.07

0.1

0.5

1

10

5

50

100


SH1LC1240SH1LC1140SH1LF1240SH1LF1140 SH2LC1140

SH1LC0730

SH1LF0730

SH1LF0524SH1LC0524

0 1 2 3 4 5 6 7STROKE [mm]

DUTY CYCLE 100%

FORCE

[N]

0.07

0.1

0.5

1

10

5

50

100

SH1LC1140

SH1LC0730

SH1LF0730

SH1LF0524SH1LC0524

SH2LC1140

SH1LC0730

SH1LF0730

SH1LF0524SH1LC0524

SH1LC1140

SH1LC0730

SH1LF0730

SH1LF0524SH1LC0524

AT20°CAT20°C

AT20°CAT20°C

CHARACTERISTICS TABLE FOR PERMANENT MAGNET SOLENOIDS


PERMANENT MAGNET SOLENOIDS AMPERE-TURN V.S. FORCE PERFORMANCE CURVESARE AT 20˚C

FOR

CE

[N]

AM ERE-T RNS

200 300 400 500 600 700 8000.05

0.1

0.5

1

5

FOR

CE

[N]

AM ERE-T RNS

200 300 400 500 600 700 8000.07

0.1

0.5

1

75

FOR

CE

[N]

AM ERE-T RNS

400 600 800 1000 12000.5

1

10

5

FOR

CE

[N]

AM ERE-T RNS

0.2

0.5

5

1

20

10

FOR

CE

[N]

AM ERE-T RNS

200 400 600 800 1000 1200200 400 600 800 1000 1200 200 400 500 600 700 8000.3

0.5

10

20

1

5

FOR

CE

[N]

AM ERE-T RNS

0.3

0.5

1

10

5

200 400 500 600 700 800

FOR

CE

[N]

AM ERE-T RNS

0.03

0.5

S 2

S 3

S 3S 4S 5

S 1

S 0.5

S 3S 4S 5

S 1

S 0.5

S 3S 4S 5

S 1S 0.5

S 3S 4S 5

S 1S 2S 2

S 2S 2

S 3S 4S 5

S 1S 0.5

S 3S 4S 5S 6S 7S 6S 7

S 1S 0.5

S 2S 2S 3S 4S 5

S 1S 0.5

S 3S 4S 5S 6S 7S 6S 7

S 1S 0.5

S 2S 2

S 0.5

S 3S 4

S 5

S 1S 0.5

S 3S 4

S 5

S 1S 2S 2

S 0.5

FOR

CE

[N]

AM ERE-T RNS

0.7

1

5

10

5070

FOR

CE

[N]

AM ERE-T RNS

AM ERE-T RNS

1

5

10

5070

S 4

1

2

0.1

S 3S 4S 5

S 1S 0.5

S 3S 4S 5S 6S 7S 6S 7

S 1S 0.5

S 2S 2S 3S 4S 5

S 1S 0.5

S 3S 4S 5S 6S 7S 6S 7

S 1S 0.5

S 2S 2

FOR

CE

[N]

AM ERE-T RNS

400 600 800 1000 14001200 18001600 400 600 800 1000 14001200 18001600

400 600 800 1000 14001200 18001600 400 600 800 1000 14001200 18001600

1

5

10

50

100

FOR

CE

[N]

1

5

10

50

100

S 1

S 0.5

S 3S 4S 4

S 1.5

S 5S 5

S 1

S 2S 2

S 0.5

SH1LC0524

SH1LC0730 SH1LF0730

SH1LF0524 SH2LC0524

SH1LC1140

SH1LC1240

SH1LF1140

SH1LF1240

SH2LC1140

SH2LC0730

PERMANENT MAGNET (Self Holding) SOLENOIDS · PDF filePERMANENT MAGNET (Self Holding) SOLENOIDS...

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Transcript of PERMANENT MAGNET (Self Holding) SOLENOIDS · PDF filePERMANENT MAGNET (Self Holding) SOLENOIDS...