L1A Primary Part Type Designation
L1A is a flat type laminated iron-core linear motor primary part. The model number format is as follows:
L1A - 3P - L - B - WM - O - O - G - PRIM
L1A = Linear motor primary part, laminated, flat type
3P = Three-phase motor
L = Coil system length: 100 mm, 200 mm
B = Magnet track width: 25 mm, 50 mm, 75 mm
WM = Winding design: WM = Standard, WX = Special
O/S = Cooling option: O = Standard (none), S = Special
O/S = Temperature monitoring: O = Standard (PTC triple sensor + KTY84-130), S = Special
G/W/S = Connection type: G = Standard cable (1.0 m), W = Terminal block, S = Special
PRIM = Primary part
| Code Position | Code | Meaning | Options |
|---|---|---|---|
| Series | L1A | Linear motor primary part, laminated, flat type | — |
| Phases | 3P | Three-phase motor | — |
| Length L | 100 / 200 | Coil system length [mm] | 100 mm, 200 mm |
| Width B | 25 / 50 / 75 | Magnet track width [mm] | 25 mm, 50 mm, 75 mm |
| Winding | WM / WX | Winding design | WM = Standard, WX = Special |
| Cooling | O / S | Cooling option | O = Standard (none), S = Special |
| Temperature monitoring | O / S | Temperature monitoring method | O = Standard (PTC triple sensor + KTY84-130), S = Special |
| Connection | G / W / S | Connection type | G = Standard cable (1.0 m), W = Terminal block, S = Special |
| Part | PRIM | Primary part | — |
L1B Primary Part Type Designation
L1B is a high-force type laminated iron-core linear motor primary part. The model number format is the same as L1A, with the difference being the available length options:
L1B - 3P - L - B - WM - O - O - G - PRIM
L1B = Linear motor primary part, laminated, high-force type
3P = Three-phase motor
L = Coil system length: 100 mm, 200 mm, 300 mm
B = Magnet track width: 25 mm, 50 mm, 75 mm
WM = Winding design: WM = Standard, WX = Special
O/S = Cooling option: O = Standard (none), S = Special
O/S = Temperature monitoring: O = Standard (PTC triple sensor + KTY84-130), S = Special
G/W/S = Connection type: G = Standard cable (1.0 m), W = Terminal block, S = Special
PRIM = Primary part
Difference between L1B and L1A: L1B adds a 300 mm length option for the coil system (L1A only has 100 / 200 mm). All other code meanings are identical.
L1A / L1B Secondary Part Type Designation
L1A and L1B share the same secondary part (magnet track) specification. The model number format is as follows:
L1 - B - L - O - 2 - SEK
L1 = Shared secondary part for L1A and L1B
B = Magnet track width: 25 mm, 50 mm, 75 mm (100 mm custom order)
L = Secondary part length: 38 mm, 152 mm (special lengths in 19 mm increments available)
O/S = Magnet cover: O = Standard (none), S = Special (stainless steel)
1/2 = Fastening method: 1 = M5 threaded hole (special), 2 = M5 through hole DIN 6912 (standard)
SEK = Secondary part
| Code Position | Code | Meaning | Options |
|---|---|---|---|
| Series | L1 | Shared secondary part for L1A / L1B | — |
| Width B | 25 / 50 / 75 | Magnet track width [mm] | 25, 50, 75 mm (100 mm custom order) |
| Length L | 38 / 152 | Secondary part length [mm] | 38, 152 mm (special lengths in 19 mm increments available) |
| Cover | O / S | Magnet cover | O = Standard (none), S = Special (stainless steel) |
| Fastening | 1 / 2 | Fastening method | 1 = M5 threaded hole (special), 2 = M5 through hole DIN 6912 (standard) |
| Part | SEK | Secondary part | — |
L1C Primary Part Type Designation
L1C is a large laminated iron-core linear motor primary part that supports water cooling options. The model number format is as follows:
L1C - 3P - L - B - WM - O - O - G - PRIM
L1C = Linear motor primary part, laminated, large type
3P = Three-phase motor
L = Coil system length: 100, 200, 300, 400 mm
B = Magnet track width: 50, 75, 100, 125, 150 mm (depending on assembly method)
WM = Winding design: WM = Standard, WX = Special
O/W/T/S = Cooling: O=Standard (none), W=Water cooling via intermediate plate, T=Water cooling + thermal insulation, S=Special (on request)
O/S = Temperature monitoring: O = Standard (PTC triple sensor + KTY84-130), S = Special
G/W/S = Connection: G=Standard cable (1.0 m), W=Terminal (non-cooled, Ic ≤ 10 A only), S=Special
PRIM = Primary part
Differences between L1C and L1A/L1B:
- Coil system length extended to 100 / 200 / 300 / 400 mm
- Magnet track width extended to 50 / 75 / 100 / 125 / 150 mm (depending on assembly method)
- New cooling options: W=Water cooling (intermediate plate), T=Water cooling + thermal insulation, S=Special
L1C Secondary Part Type Designation (L2)
L1C uses a dedicated L2 secondary part with larger magnet track dimensions than L1:
L2 - B - L - O - 2 - SEK
L2 = Dedicated secondary part for L1C
B = Magnet track width: 50, 75, 100, 125, 150 mm
L = Secondary part length: 76, 152, 380, 760 mm (special lengths in 19 mm increments on request)
O/S = Magnet cover: O = Standard (none), S = Special (stainless steel)
1/2 = Fastening method: 1 = M6 threaded hole (special), 2 = M6 through hole ISO 4762 (standard)
SEK = Secondary part
| Code Position | Code | Meaning | Options |
|---|---|---|---|
| Series | L2 | Dedicated secondary part for L1C | — |
| Width B | 50 / 75 / 100 | Magnet track width [mm] | 50, 75, 100, 125, 150 mm |
| Length L | 76 / 152 / 380 / 760 | Secondary part length [mm] | 76, 152, 380, 760 mm (special lengths in 19 mm increments on request) |
| Cover | O / S | Magnet cover | O = Standard (none), S = Special (stainless steel) |
| Fastening | 1 / 2 | Fastening method | 1 = M6 threaded hole (special), 2 = M6 through hole ISO 4762 (standard) |
| Part | SEK | Secondary part | — |
Glossary — Winding-Independent Parameters
The following parameters are not affected by winding design and apply to all L1 series linear motors.
Force-Related Parameters
| Symbol | Meaning | Unit | Description |
|---|---|---|---|
| Fu | Limit force | N | Force at strong magnetic circuit saturation. Risk of demagnetization or thermal damage if exceeded. Must not be used as selection basis, but must be considered for short-circuit braking. |
| Fp | Peak force | N | Motor force in the saturation region (at current Ip). Permissible duration depends on motor temperature, typically 1–3 seconds. |
| Fpl | Linear peak force | N | Motor force achievable briefly (a few seconds) at the end of the linear dynamic range (at current Ipl). |
| Fc | Rated force (uncooled) | N | Motor force at rated current Ic with equal phase loading. Assumes heat dissipation area of approximately 3 times the primary part surface area. |
| Fcw | Rated force (cooled) | N | Motor force in water-cooled continuous operation at current Icw. Temperature drop between winding and cooling approximately 100 K. Cooling water supply temperature: 20°C ± 5°C. |
| Fs | Standstill force | N | Available force at standstill and control frequencies below approximately 1 Hz. Due to unequal phase current distribution in the motor, the value is 0.7 times the reference force (Fc or Fcw). |
Power Loss Parameters
| Symbol | Meaning | Unit | Description |
|---|---|---|---|
| Pl | Power loss | W | Thermal power loss in the winding. Calculated via motor constant: Pl = (F / km)2 |
| Plp | Peak power loss | W | Peak power loss at current Ip. |
| Plpl | Linear peak power loss | W | Peak power loss at current Ipl. |
| Plc | Rated power loss (uncooled) | W | Power loss at current Ic. |
| Plcw | Rated power loss (cooled) | W | Power loss at current Icw. |
Other Winding-Independent Parameters
| Symbol | Meaning | Unit | Description |
|---|---|---|---|
| θ | Winding temperature | °C | Permissible winding temperature recorded by sensor (including offset). Surface temperature depends on mounting method, heat dissipation, and operating mode. |
| τel | Electrical time constant | ms | L/R ratio, approximately constant regardless of winding design. The effective time constant depends on the voltage overshoot magnitude. |
| Fr | Detent force (cogging force) | N | Sum of reluctance-related forces along the feed direction in a currentless motor in motion. Expressed as peak-to-peak ripple value. |
| km | Motor constant | N/√W | Efficiency relationship between generated force and power loss. Temperature-dependent; decreases to approximately 0.88 times the 25°C value at winding temperature 100°C. Valid for static operation and linear dynamic range. |
| kd | Damping constant (short circuit) | N/(m/s) | Speed-dependent regenerative damping force generated by the motor under short circuit: Fd = kd × v |
| 2τp | Pole pair width | mm | Stroke distance for one pole pair (magnetic cycle). τp is the pole width in the direction of motion (magnet width), with alternating N/S magnetic field. |
| Fa | Attraction force | N | Magnetic attraction force between primary part and secondary part. |
Glossary — Winding-Dependent Parameters
The following parameters vary with winding design; values change with winding specifications.
| Symbol | Meaning | Unit | Description |
|---|---|---|---|
| kf | Force constant | N/Arms | Within the linear dynamic range: F = In × kf |
| ku | Back EMF constant | V/(m/s) | Armature back voltage at motor terminals in generator operation: UEMF = ku × v |
| vlim | Limit speed | m/s | Limit speed achievable briefly, at which Fp can be maintained approximately constant at current Ip. Motor force decreases at higher speeds. Higher speeds achievable at lower current/force. |
| UDCL | DC bus voltage | V | Supply voltage for the power actuator. Due to back voltage and frequency-related losses, higher voltages are required at higher speeds. |
| R25 | Winding resistance | Ω | Phase-to-phase winding resistance at 25°C. Increases to approximately 1.3 times at 100°C. |
| Iu | Limit current | Arms | Limit current at strong magnetic circuit saturation (<1 second). Caution: Risk of demagnetization! May cause thermal damage! |
| Ip | Peak current | Arms | Peak RMS current in the iron core saturation region. Can be used as selection basis (see Fp). |
| Ipl | Linear peak current | Arms | Peak RMS current at which approximately proportional force curve can be maintained. |
| Ic | Rated current (uncooled) | Arms | Effective rated current at which power losses bring coil temperature to approximately 100°C without forced cooling, under defined heat sink dimensions (see Fc). |
| Icw | Rated current (cooled) | Arms | Effective rated current achievable in continuous operation with water cooling (supply water temperature 25°C). |
| Is | Standstill current | Arms | Effective standstill current at standstill and control frequencies below approximately 1 Hz. Due to different phase current distribution in the motor, must be reduced to 0.7 times the reference current (Ic or Icw) to prevent local overheating. |
| L | Inductance | mH | Motor inductance, measured between two phases. |