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Determining the 8JSA order code

Bestellschlüssel Kopf HP 8JS  DE

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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