S3a Series

S3a Series spindle servo drive

 

S3a series digital AC servo spindle drive is independently developed and produced by Zhejiang Tonghang Electric Drive Technology Co., Ltd., and is an AC servo spindle drive product with leading domestic level. This series of products adopts advanced full digital control and AC motor servo control theory, with excellent system performance and high reliability, and is widely used in spindle drives of various CNC machine tools, textile machinery and other related industrial machinery.

Universal Servo Drive Standard Specifications And Performance Parameters

 

Model			S3a-H37	S3a-H55	S3a-H75	S3a-H150	S3a-H220	S3a-H370
Input Power			三相AC380V(85%～110%) 50 Hz /60Hz±1Hz
Maximum output current effective value (A)			20	30	42	60	84	113
Standard motor rated power (kW)			3.7	5.5	7.5	15	22	37
Basic Specifications	Main circuit mode		Three-phase full-wave rectification, IPM SVPWM inverter bridge
	Feedback mode		Incremental encoder 1024p/rev, 2500p/rev, resolver, sine-cosine encoder
	Working mode		S3a: Manual, Jog, Self-run, Speed, Position, Speed/Position
	Communication mode		RS485
Speed control method	performance	Speed range	1～30000r/min Maximum output frequency 1kHz (speed closed loop control)
		Speed ratio	1:30000 Constant power speed range > 4:1 (corresponding to the standard motor speed range of 1500r/min～6000r/min)
		Steady speed accuracy	When the load change rate is 0-100%, the speed change rate < (0.1% of the rated speed)
	Speed command input	Analog speed command voltage range	① DC 0～10V + forward and reverse signal + enable signal; ② DC-10V～+10V + enable signal;
		Speed command electronic gear function	Analog instruction multiplication coefficient: -32767~32767; Analog instruction division coefficient: 1~32767;
Position control method	Position command input pulse type		① Pulse + direction; ② CCW pulse/CW pulse; ③ A/B two-phase orthogonal pulse;
	Position command electronic gear function		Position command multiplication coefficient: 1~32767; Position command division coefficient: 1~32767;
Input output signal basic function	Position feedback signal output		Motor encoder or spindle encoder signal 1:1 output, A/B/Z differential signal, line driver output
	Status signal output		Spindle ready, zero speed output, position/speed reached, alarm output, quasi stop completed
	Control signal input		Main spindle enable, CCW forward rotation signal, CW reverse rotation signal, alarm clearing, main spindle quasi stop, speed/position switching
Basic function	Regenerative energy processing function		The driver is equipped with a built-in regenerative energy processing circuit and an external regenerative resistor
	operative function		4 buttons to select status display, parameter settings, operation management, function operating, etc
	monitoring function		5-digit LED digital display, capable of displaying speed, torque, speed command, position deviation, position, load current, output voltage, IO status, control mode, command pulse frequency, alarm code, etc
	Protection function		Overvoltage, undervoltage, overcurrent, overload, overspeed, position deviation, quasi stop alarm, position deviation, brake abnormality, encoder abnormality, etc
	Internal speed command function		Multiple speed commands pre-set internally can be selected
	Spindle stop function		Support high-speed operation with direct quasi stop, flexible setting of quasi stop direction and position
	Rigid tapping function		Can participate in interpolation control of coordinate axes, complete functions such as rigid tapping and thread cutting
	Feed servo function		Optimized control algorithm enables the spindle to have all the functions of a servo axis

 

S3a Series Spindle Drive External Dimensions (mm)

 

Driver size one (model S3a-H37:3.7kW)

Figure 1 Dimension diagram of S3a-H37 spindle drive (unit: mm)

Driver size two(model S3a-H55:5.5kW/S3a-H75: 7.5kW)

Figure 2 Dimension diagram of S3a-H55/S3-H75 spindle drive (unit: mm)

 

S3a Series Spindle Drive Wiring Diagram

Control Wiring Diagram

 

Introduction To Servo Drive Ports 

 

name	Terminal symbol	detailed description
Main circuit power supply	R、S、T	Connect external AC power supply: three-phase AC380V (85%~110%) 50/60Hz
Braking resistor terminal	P、BK	When using an external braking resistor in parallel with an internal braking resistor, please pay attention to selecting the resistance and power to avoid burning out the driver.
Motor connection terminal	U	Output to motor U-phase power supply
	V	Output to motor V-phase power supply
	W	Output to motor W-phase power supply
ground terminal	Ⓔ	Grounding terminal of motor casing
	Ⓔ or PE	Driver grounding terminal

 

Control Circuit Terminal

 

type	name	function	detailed description
External 24V control power supply	COM+	DC24V control power output terminal	The positive pole of the power supply at the input terminal is used to drive the optocoupler at the input terminal, DC12~24V, Current ≥ 100mA.
	DO COM	Control power supply 0V terminal	Power ground of input terminal
Control signal input (Programmable)	DI1(SON)	enable input	DI1 - DI8 digital input functions are all programmable. The examples shown in this table are factory default configurations, which can be flexibly configured by driver software parameters and can be adapted to various types of upper computers, such as CNC systems PLC, Motion controllers, etc.
	DI2(CSMODE)	Switching between speed/ position control modes
	DI3(CCW)	Positive rotation allowed/enabled
	DI4(CW)	Reverse allowed/enabled
	DI5(SPTO)	Spindle quasi stop
	DI6(SP1)	Multi speed selection 1
	DI7(SP2)	Multi speed selection 2
	DI8(SP3)	Multiple speed options 3
Control signal output (Programmable)	DO1( RDY)	The spindle is ready	All DO1 - DO5 digital output functions are programmable, and the examples shown in this table are factory default configurations. They can be flexibly configured by driver software parameters and can be adapted to various types of upper computers, such as CNC systems PLC, Motion controllers, etc.
	DO2(ALM)	ALARM IN
	DO3(ZSP)	Zero speed arrival
	DO4(ASP)	Speed arrived
	DO5(FIN)	The spindle has been stopped accurately
	DO6(CS_FIN)	Speed/position switch completed
Analog command input	AS+	Simulate command input positive	Positive connection with the analog command output of the upper computer
	AS-	Simulate instruction input negative	Negative connection to the analog command output of the upper computer
	GNDA	Analog signal ground	Connect to the analog signal ground of the upper computer
Pulse quantity command input	PULS+	Command pulse PLUS input	External command pulse input terminal. Note: The pulse input mode is set by parameter P035 and supports three types of pulse input modes
	PULS-
	SIGN+	Command pulse SIGN input	◆P035=0: Command pulse-direction mode (default state); ◆P035=1:CCW/CW command pulse mode; ◆P035=2:Orthogonal pulse mode.
	SIGN-
Encoder output signal (Sent to the upper computer)	OA+ / OA-	Encoder A-phase signal output	◆Encoder ABZ signal differential drive output (26LS31 output, equivalent to Rs422); ◆Non isolated output (non insulated).
	OB+ / OB-	Encoder B-phase signal output
	OZ+ / OZ-	Encoder Z-phase signal output
	CZ	Encoder Z-phase collector electrode open circuit output	◆The Z-phase signal of the encoder is output by an open collector. When the Z-phase signal of the encoder appears, it outputs ON (output conduction), otherwise it outputs OFF (output cutoff); ◆Non isolated output (non insulated);
Encoder input signal (From spindle motor)	A+/A-	Encoder A-phase signal input	The signal input terminal of the spindle motor has different definitions for different types of encoder signals. The table shows the photoelectric encoder, and subsequent products support photoelectric encoders, rotary encoders, sine cosine encoders, and absolute value encoders
	B+/B-	Encoder B-phase signal input
	Z+/Z-	Encoder Z-phase signal input
	5V/GNDD	Encoder 5V power/ground
Ground terminal	PE / FG	Shielded wire protection ground	Connect to the shielded wire of the signal cable

 

Driver Accessories(braking Resistor)

 

Recommended SelectionTable forBraking Resistors
Drive model	Maximum braking current	Braking resistor resistance value	Braking resistor power	Is the driver equipped with a built - in braking resistor
S3a - H37 (3.7kW 25A module)	20A	≥50Ω	≥1500W	no
S3a - H55 (5.5kW 50A module)	20A	≥50Ω	≥1500W	no
S3a - H75 (7.5kW 75A module)	35A	≥30Ω	≥2000W	no
S3a - H150 (15kW 100A module)	35A	≥27Ω	≥2500W	no
S3a - H220 (22kW 150A module)	50A	≥15Ω	≥3000W	no