Voltronic Power 1KVA Manuel utilisateur
Axpert MKS 1~3KVA 24V Service manual
1
Axpert Charger/ Inverter
Service manual
Axpert MKS 1~3KVA 24V Service manual
2
Revision
Description
Prepared
by
Approved
by
V00
Initial draft release
Jing Fang
2013-06-10
Francis Fu
2013-06-11
Axpert MKS 1~3KVA 24V Service manual
3
Table of contents
1. General information.......................................................................................................................................... 4
1.1 Getting start............................................................................................................................................ 4
1.2 Important safety instructions ............................................................................................................... 4
2. Functional block................................................................................................................................................ 6
3. Working principle of the major functional block............................................................................................ 7
3.1 Switch Power Supply............................................................................................................................ 7
3.2 DC TO DC converter (push-pull)......................................................................................................... 8
3.3 DC TOAC inverter (full-bridge)........................................................................................................... 9
3.4 Charger................................................................................................................................................. 10
4. Functional explanations for each PCB......................................................................................................... 11
4.1 Main board........................................................................................................................................... 11
4.2 MPPT board......................................................................................................................................... 11
4.3 COMM board....................................................................................................................................... 11
4.4 LED board............................................................................................................................................ 12
5. Interface............................................................................................................................................................ 12
5.1 LED Indicator....................................................................................................................................... 12
5.2 LCD Display Icons .............................................................................................................................. 13
6. Troubleshooting............................................................................................................................................... 16
6.1 Fault Reference Code........................................................................................................................ 16
6.2 Warning Indicator................................................................................................................................ 17
6.3 Trouble shooting according to fault indication................................................................................ 17
6.4 Quick start............................................................................................................................................ 18
7. Test Step........................................................................................................................................................... 21
8. Electrical specification.................................................................................................................................... 22
Table 1 Line Mode Specifications................................................................................................................. 22
Table 2 Invert Mode Specifications............................................................................................................... 23
Table 3 Charge Mode Specifications............................................................................................................ 24
Axpert MKS 1~3KVA 24V Service manual
4
1. General information
1.1 Getting start
This manual is for Axpert MKS 1KVA-3KVA series, it can help service personal perform the basic
maintenance and repair service.
This manual focus on the service, so you should get the basic operation of the Inverter/Charger from the
user manual, and make sure you had read and understood user manual before you use this service
manual.
The manual include 8 sections, as follows
General Information, this section show you the general information of the service manual
Functional Block, this section show you the major functional block of the Inverter/Charger
Working Principle of the major Functional Block, this section show you the major functional block
Function explanations for each PCB, this section show you all the PCBs of the Inverter/Charger
Interface, this section show you the LCD interface, include display and setting
Trouble shooting, this section will give you the way to find the trouble
Test step ,this section tell you how to test the Inverter/Charger after you repair the unit
Electric Specifications, this section show you the basic electric specification of the Inverter/Charger
1.2 Important safety instructions
WARNING: This chapter contains important safety and operating instructions. Read and
keep this manual for future reference.
1. Before using the unit, read all instructions and cautionary markings on the unit, the batteries and
all appropriate sections of this manual.
2. CAUTION --To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries.
Other types of batteries may burst, causing personal injury and damage.
3. Do not disassemble the unit. Take it to a qualified service center when service or repair is required.
Incorrect re-assembly may result in a risk of electric shock or fire.
4. To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or
cleaning. Turning off the unit will not reduce this risk.
5. CAUTION –Only qualified personnel can install this device with battery.
6. NEVER charge a frozen battery.
7. For optimum operation of this inverter/charger, please follow required spec to select appropriate
cable size. It’s very important to correctly operate this inverter/charger.
Axpert MKS 1~3KVA 24V Service manual
5
8. Be very cautious when working with metal tools on or around batteries. A potential risk exists to
drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals.
Please refer to INSTALLATION section of this manual for the details.
10. Fuses (40A, 32VDC *4pcs for 1KVA/2KVA and *6pcs for 3KVA) are provided as over-current
protection for the battery supply.
11. GROUNDING INSTRUCTIONS -This inverter/charger should be connected to a permanent
grounded wiring system. Be sure to comply with local requirements and regulation to install this
inverter.
12. NEVER causeAC output and DC input short circuited. Do NOT connect to the mains when DC
input short circuits.
13. Warning!! Only qualified service persons are able to service this device. If errors still persist after
following troubleshooting table, please send this inverter/charger back to local dealer or service
center for maintenance.
Axpert MKS 1~3KVA 24V Service manual
6
2. Functional block
Axpert MKS 1KVA-3KVA series production employ a double conversion topology, comprise following
functional blocks, as shown in figure 2.1
Figure 2.1 function block diagram
Axpert MKS 1~3KVA 24V Service manual
7
3. Working principle of the major functional block
3.1 Switch Power Supply
The switch power supply (SPS) supplies DC power for Inverter/Charger operation. The input voltage of
the SPS is the battery orAC Charger output voltage.
Figure 3.1 basic circuit of power supply
This is the fly-back DC-DC converter, fly-back operation can be easily recognized from the position of the
dots on the transformer primary and secondary(these dots show starts of the winds). When Q1 is ON, the
dot ends of all winds are negative with respect to their no-dot ends. Output rectifier diodes D1, D2, D32
and D34 are reverse-biased and all the output load currents are supplied from storage filter capacitors C1,
C2, C3 and C4.The primary coil of the transformer acts as an inductor and stored energy.
When Q1 is OFF, the stored energy in the primary coil is delivered to secondary filter capacitors CE5, CE6,
CE7and C104.
As shown in figure 3.1, this circuit may generate several output voltage, such as +12V,-12V, +VCC, +5V,
HFPW+, GTDRV3.
Axpert MKS 1~3KVA 24V Service manual
8
3.2 DC TO DC converter (push-pull)
The push-pull topology is a transformer isolated forward-mode regulator. Unlike the
Fly-back transformer, the push-pull transformer does not store any energy and output current is drawn
when either power switches (Q7-Q11 or Q2-Q6) is conducting.
A push-pull topology is shown in figure 3.2, power switch Q7-Q11 and Q2-Q6 receive 180 out-of-phases.
Refer to figure 3.2, the battery voltage is transformed through a push-pull DC-DC converter to >330Vdc
as DC BUS for inverter. When the line fails, the DC BUS voltage is caught up to supply the power needed
by the inverter immediately.
The output voltage (DCBUS) must be higher than the input voltage (BAT+) .It mentioned by the primary
turns and secondary turns. In this circuit, BAT+ =24VDC with MKS1000/2000/3000,DC BUS voltage
above 330Vdc.
Figure 3.2 Push-pull topology
Axpert MKS 1~3KVA 24V Service manual
9
3.3 DC TO AC inverter (full-bridge)
The Inverter circuit (Figure 3.3) and PWM control are only active under battery mode. The Inverter circuit
of Axpert MKS series is based on a full-bridge circuitry and its output is driven by photo-couplers. The
photo-couplers are capable to drive high energy and high speed power of MOSFET and IGBT with
independent high and low referenced output channels.
To construct a high frequency PWM inverter, the drivers receive switching signals from PWM generation
circuit through a pair of photo-couplers to trigger the upper IGBT and the lower IGBT alternately. The
output of IGBT's is filtered by an LC circuit to reduce the o/p voltage harmonics distortion.
Figure 3.3 Full-bridge topology
Axpert MKS 1~3KVA 24V Service manual
10
3.4 Charger
The Charger of utility is to recharge and maintain the batteries at fully charged condition .The charger
charges the batteries with a constant current at initial stage, and as battery voltage keep increasing, the
charge current decrease accordingly until the charge voltage reached the constant voltage level, and then
the charger turn to the floating charge mode.
As shown in figure 3.4, the charger also employed a fly-back topology like the SPS.
Figure 3.4 Charger fly-back topology
Autres manuels pour 1KVA
1
Ce manuel convient aux modèles suivants
2
Table des matières
