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Cooling / construction type (b)

Cooling type A

8JS three-phase synchronous motors with cooling type A are self-cooling and have a long, slim design. The motors must be installed on the cooling surface (flange).

Size (c)

8JS three-phase synchronous motors are available in six different sizes (2 through 7). They have different dimensions (especially flange dimensions) and power ratings. These different sizes are indicated by a number represented by (c) in the model number. The larger the number, the larger the flange dimensions and power rating for the respective motor.

Overview

Cooling type

Available sizes

2

3

4

5

6

7

A

Yes

Yes

Yes

Yes

Yes

Yes

Length (d)

8JS three-phase synchronous motors are available in up to five different lengths. They have different power ratings with identical flange dimensions. These different lengths are indicated by a number represented by (d) in the model number.

Overview

Length

Available sizes

2

3

4

5

6

7

1

---

Yes

---

Yes

---

---

2

Yes

Yes

Yes

Yes

Yes

Yes

3

---

Yes

Yes

---

Yes

Yes

4

Yes

---

Yes

Yes

Yes

Yes

5

---

---

---

---

Yes

---

Encoder system (ee)

Resolver

General information

BRX resolvers are used in the servo motors. These resolvers are fed with a single sinusoidal signal (reference signal) and return two sinusoidal signals. The amplitude of these signals change with the angular position (sine or cosine form).

Technical data

Name

Order code (ee)

R0

Accuracy

10 angular minutes

Vibration during operation
10 < f ≤ 500 Hz

≤ 100 m/s²

Shock during operation
Duration 11 ms

≤ 400 m/s²

EnDat encoders

General information

EnDat is a standard developed by Johannes Heidenhain GmbH (www.heidenhain.de) that incorporates the advantages of absolute and incremental position measurement while also offering a read/write parameter memory in the encoder. With absolute position measurement (the absolute position is sampled serially), a homing procedure for referencing is usually not required. Where necessary, a multi-turn encoder (4096 revolutions) should be installed. To save costs, a single-turn encoder and a reference switch can also be used. In this case, a homing procedure must be carried out. The incremental process allows the short deceleration periods necessary for position measurement when using drives with highly dynamic characteristics. With the sinusoidal incremental signal and the fine resolution in the EnDat module, a very high positioning resolution is achieved in spite of the moderate signal frequencies used.

Technical data

Different types of EnDat 2.1 encoders can be used depending on requirements:


Name

E4 1)

E5 1)

E6 2)

E7 2)

E8 1)

E9 1)

EA 2)

EB 2)

Encoder type

EnDat single-turn

EnDat multi-turn

EnDat single-turn

EnDat multi-turn

EnDat single-turn

EnDat multi-turn

EnDat single-turn

EnDat multi-turn

Operating principle

Optical

Optical

Optical

Optical

Inductive

Inductive

Inductive

Inductive

EnDat protocol

EnDat 2.1

EnDat 2.1

EnDat 2.1

EnDat 2.1

EnDat 2.1

EnDat 2.1

EnDat 2.1

EnDat 2.1

Resolution

512-line

512-line

2048-line

2048-line

16-line

16-line

32-line

32-line

Recognizable revolutions

---

4096

---

4096

---

4096

---

4096

Accuracy

±60"

±60"

±20"

±20"

±480"

±480"

±180"

±180"

Cutoff frequency

≥ 200 kHz (-3 dB)

≥ 200 kHz (-3 dB)

≥ 400 kHz (-3 dB)

≥ 400 kHz (-3 dB)

≥ 6 kHz (-3 dB)

≥ 6 kHz (-3 dB)

≥ 6 kHz (-3 dB)

≥ 6 kHz (-3 dB)

Vibration during operation3)

55 < f ≤ 2000 Hz

≤ 100 m/s²

≤ 100 m/s²

≤ 150 m/s²

≤ 150 m/s²

≤ 300 m/s²

≤ 300 m/s²

≤ 200 m/s²

≤ 200 m/s²

Shock during operation4)

Duration 6 ms

≤ 1000 m/s²

≤ 1000 m/s²

≤ 1000 m/s²

≤ 1000 m/s²

≤ 1000 m/s²

≤ 1000 m/s²

≤ 2000 m/s²

≤ 2000 m/s²

Manufacturer

Internet address

Dr. Johannes Heidenhain GmbH

www.heidenhain.de

Manufacturer's product ID

ECN1113

EQN1125

ECN1313

EQN1325

ECI1118

EQI1130

ECI1319

EQI1331

1) Only available for size 2 and 3 motors.
2) Only available for size 4, 5, 6 and 7 motors.
3) In accordance with IEC 60 068-2-6
4) In accordance with IEC 60 068-2-27
Rated speed (nnn)

8JSA three-phase synchronous motors can be delivered with different nominal speeds depending on the size and length.

Size

Lengths

1

2

3

4

5

2

---

8000

---

8000

---

3

5000

3000, 5500

4500

---

---

4

---

3500

5000

4000

---

5

4500

4500

---

2750, 5000

---

6

---

3000

2250

3000

2500

7

---

2000

2400

1800

---

Oil seal (ff)

All 8JSA three-phase synchronous motors are available with an optional Form A oil seal in accordance with DIN 3760.
When equipped with an oil seal, the motors have IP65 protection in accordance with EN 60034-5.

Proper lubrication of the oil seal must be ensured throughout the entire service life of the motor.

Holding brake (ff)

All 8JSA three-phase synchronous motors can be delivered with a holding brake. It is installed directly behind the B bearing on the motor and used to hold the motor shaft when no power is applied to the servo motor.

Operating principle

The holding brake is a spring-loaded brake and is controlled by the ACOPOS servo drive or an ACOPOSmulti inverter module. Based on principle, this type of holding brake exhibits a minimal amount of backlash.

This brake is designed as a holding brake and is not permitted to be used for operational braking! Under these conditions, the brake has a service life of approximately 5,000,000 cycles (opening and closing the brake is one cycle). Loaded braking during an emergency stop is permitted but reduces its service life. The required brake holding torque is determined based on the actual load torque. If not enough information is known about the load torque, it is recommended to assume a safety factor of 2.

Technical data for the standard holding brake

Name

Motor size

2

3

4

5

6

7

Holding torque MBr [Nm]

1.42

2.5

5.3

14.5

25

53

Connected load Pon [W]

8.4 ±7%

10.1 ±7%

12.8 ±7%

19.5 ±7%

25.7 ±7%

35.6 ±7%

Supply current Ion [A]

12:35 AM

12:42 AM

12:53 AM

0.82

1.07

1:48 AM

Installed voltage Uon [V] (+6% / -10%)

24 VDC

24 VDC

24 VDC

24 VDC

24 VDC

24 VDC

Moment of inertia JBr [kgcm²]

0,011

0,011

0,068

0,173

0.61

1.64

Mass mBr [kg]

12:27 AM

12:35 AM

0.63

1.1

2

2.9

Shaft end (ff)

All 8JSA three-phase synchronous motor shafts comply with DIN 748 and are available with a smooth shaft.

Smooth shaft end

A smooth shaft end is used for a force-fit shaft-hub connection and guarantees a backlash-free connection between the shaft and hub as well as a high degree of operating smoothness. The end of the shaft has a threaded center hole.

Keyed shaft end

A keyed shaft end is used for a form-fit torque transfer with low demands on the shaft-hub connection and for handling torque in a constant direction.

The keyways for the 8JS three-phase synchronous motors conform to keyway form N1 in accordance with DIN 6885-1. Form A keyed shafts that conform to DIN 6885-1 are used. Balancing motors with keyways is done using the half-key convention according to ISO 1940/1, G6.3.

The end of the shaft has a threaded center hole that can be used to mount drive elements with shaft end plates.

Special motor options (gg)

00...No special motor options

Motor version (h)

The motor version is automatically specified by the configurator and can be seen in the technical data.

Order code motor options (ff)

The respective code (ff) for the order key can be found in the following table:

Motor option

Connectiondirection

Oil seal

Holding brake

Shaft end

Code for the order key (ff)

Angled (swivel connector)

No

No

Smooth

D0

Keyed

D1

Normal

Smooth

D2

Keyed

D3

Yes

No

Smooth

D6

Keyed

D7

Normal

Smooth

D8

Keyed

D9

Reduction of rated values depending on the motor option

The nominal values are reduced depending on the motor option selected (stall torque M0 and nominal torque Mn) for the motor as seen in the following table: (all values in [Nm])

Motor

Holding brake

EnDat encoders

Holding brakes and EnDat encoders

Oil seal

8JSA22.eennnffgg-0

0.01

0

0.02

0.047

8JSA24.eennnffgg-0

0.05

0

0.12

0.047

8JSA31.eennnffgg-0

0

0

0

0.047

8JSA32.eennnffgg-0

0.05

0

0.1

0.047

8JSA33.eennnffgg-0

0.1

0

0.2

0.047

8JSA42.eennnffgg-0

0.12

0.1

0.36

0.071

8JSA43.eennnffgg-0

0.12

0.2

0.55

0.071

8JSA44.eennnffgg-0

0.12

0.3

0.76

0.071

8JSA51.eennnffgg-0

0.15

0.15

0.39

0.13

8JSA52.eennnffgg-0

0.26

0.34

0.76

0.13

8JSA54.eennnffgg-0

0.43

0.86

1.55

0.13

8JSA62.eennnffgg-0

0.5

0.9

1.6

0.25

8JSA63.eennnffgg-0

0.9

1.2

2.4

0.25

8JSA64.eennnffgg-0

1.3

1.5

3.1

0.25

8JSA65.eennnffgg-0

1.7

1.8

4

0.25

8JSA72.eennnffgg-0

1

2

3.9

0.25

8JSA73.eennnffgg-0

1

2.7

5.1

0.25

8JSA74.eennnffgg-0

1

3.4

6.2

0.25

Example Order 1

A three-phase synchronous motor (type 8JSA44) with a nominal speed of 4000 rpm was selected for an application. The motor should also be equipped with a holding brake, a keyed shaft and a 2048-line EnDat single-turn encoder.

The code (ee) for the encoder system is E6.

The code (nnn) for a nominal speed of 2000 rpm is 040.

The code (ff) for the other options (oil seal, holding brake, keyed shaft and connection direction) is D3.

The model number for the required motor is 8JSA44.E6040D300-0

Example Order 2

A three-phase synchronous motor (type 8JSA54) with a nominal speed of 5000 rpm was selected for an application. The motor should also be equipped with a holding brake, a smooth shaft, an oil seal and a 2048-line EnDat multi-turn encoder.

The code (ee) for the encoder system is E7.

The code (nnn) for a nominal speed of 2000 rpm is 050.

The code (ff) for the other options (oil seal, holding brake, keyed shaft and connection direction) is D8.

The model number for the required motor is 8JSA54.E7050D800-0

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