Hardware Installation

Danger

The system slowly discharges the voltage on the input terminals when the battery is disconnected. Capacitors may remain charged unless enough time has elapsed.

Note

When working voltage is higher than 60 V, use of insulating gloves are mandatory for installation and the system must have a chassis fault detection system.

Mechanical Assembly

To fix the MC110 to an aircraft frame, take a look to the dimensions and screws positions. Screw holes must be deeper than 6 mm with M6.

Vibration Isolation

There might be situations where external isolation components might be needed.

Veronte MC110 can be mounted in different ways in order to reject the airframe vibration. The simplest way CAN be achieved by just using double-sided tape on the bottom side of MC110. Other ways may use some external structure which could be rigidly attached to the airframe and softly attached to Veronte (e.g. foam, silent blocks, aerogel, etc).

../_images/veronte-mounts.png

The user should take into account that wiring should be loose enough so vibrations may not be transmitted to MC110.

In cases where mechanical isolation is not viable, it is possible to use soft engine mounts. It is also recommended when there are other sensible payloads like video cameras or for high vibration engines.

ESC-Motor Wiring

Warning

The polarity connection of the input must be respected, otherwise a short circuit may occur.

The polarity and connections are indicated in the following image and table.

../_images/VERONTEMC110CONNECTIONS.png

Name

Description

1

HV negative

Input power from DC current

100 to 800 V DC

2

HV positive

3

Phase U

Output power to motor

4

Phase V

5

Phase W

6

Sensor connector

Encoders and sensor temperature signals

7

User connector

Communications, telemetry and control signals

The section of the cables must be dimensioned according to the maximum power that will be used

Battery cables between MC and battery should be as short as possible. If the distance between battery and motor is long, please extend phase cables in order to shorten battery cables.

Tip

Connection of the phases can be done freely, however, it will affect the direction of rotation of the motor.

Hence, if the motor is spinning in the opposite direction, switch any 2 phases around.

User Connector Wiring

To access and wire the user connector, follow the next steps:

../_images/moves.png
  1. Unscrew the enclosure.

  2. Pull up the enclosure and plug the user connector.

  3. Pass the wires between the capacitors. Heat shrinkable cover is recommended to protect wires and keep them together.

    Tip

    The capacitors have two cable tie mounts, so wires can be fixed with cable ties.

    ../_images/cable_tie_mount.png

    Cable tie mounts on capacitors

  4. Screw back the enclosure, such that wires protrudes from MC110.

Pinouts

User Connector

The user connector pinout is shown in the following figure and table:

../_images/pinout2.png

Pin numbers of user connector

User connector

Name

Description

Name

Description

1

SYNC_ID_IN

Input Signal for Sync Identification *

2

SYNC_ID_OUT

Output Signal for Sync Identification *

3

GND

Ground

4

GND

Ground

5

SYNC_OUT *

Output PWM to synchronize multiple MC110 units

6

SYNC_IN *

Input PWM to synchronize multiple MC110 units

7

GND

Ground

8

RS232_TX

RS-232 transmitter

9

OUT_485_P

RS-485 output positive

10

RS232_RX

RS-232 receiver

11

OUT_485_N

RS-485 output negative

12

FAN_PWM

Digital PWM output for fan control

13

IN_485_N

RS-485 input negative

14

HEARTBEAT

Error diagnosis signal

15

IN_485_P

RS-485 input positive

16

GND_485

Ground for RS-485

17

OPTO_PWM

Digital Input for motor speed. Optocupled inside MC110

18

OPTO_RTN

Return of pin 17

19

CANFD_N

CAN FD negative pin

20

CANFD_P

CAN FD positive pin

21

22

23

GND_CAN **

Isolated ground for CAN

24

GND_CAN **

Isolated ground for CAN

25

CANB_N

CAN B negative pin

26

CANB_P

CAN B positive pin

27

28

29

GND

Ground

30

VCC

Digital power supply 8 - 36 V

* :Synchronization between MC110s optimizes battery management.

** :Ground for CAN is not necessary, but it can be used in case of having issues with CAN signals.

Sensor Connector

The sensors connector pinout is shown in the following figure and table:

../_images/pinout.png

Pin numbers of sensor connector

Sensor connector

Name

Description

Name

Description

1

ENC_SIN

Sine input from encoder

2

ENC_COS

Cosine input from encoder

3

GND_ISO

Isolated ground

4

5_V_HALL

Isolated 5 V

5

ENC_A *

Encoder A

6

7

ENC_B *

Encoder B

8

ENC_Z *

Encoder Z

9

GND_ISO

Isolated ground

10

ISO_TEMP

External temperature sensor measurement

11

12

1_V

Power supply for external temperature sensor (1 V)

* These inputs are digital, incremental and optocupled inside MC110.

If the temperature sensor is connected as a pull-up resistor, pin 1_V (12) will be the voltage reference. If the temperature sensor is connected as a pull-down resistor, pin GND_ISO (3, 9 or 11) will be the voltage reference.

../_images/sensor.png

How to Turn On and Off

MC110 has two electric circuits: control and power. To turn on the voltage supply (with devices such as switches, relays or MOSFETs), it is mandatory to do it with the following order: first of all the control group, and then the power group.

The control group is in the user cable. The power circuit is in the negative and positive cables. Then the enabling order is summarized in the following figure:

../_images/diagrama.png

Turn on order

To turn off the MC110, the disabling order is reversed: first power circuit (input negative and positive), then the control circuit (user cable).

Electrical Diagram of CAN Bus

Like any other CAN device, Veronte MC110 requires a termination resistor to allow the connection of multiple MC110s or other CAN bus devices to the same line.

../_images/typical.png

Typical CAN diagram

Considering Veronte Autopilot includes one entrance resistor of 120 \(\Omega\), a second resistor needs to be placed at the end of the line (120 \(\Omega\)). This resistor may be placed on the cable or on another PCB.

../_images/ResOpen.png

CAN diagram with Veronte Autopilot

MC110 has an internal resistor of 120 \(\Omega\), which can be activated by software. Then, another way to connect multiple CAN bus devices lies in connecting a MC110 to the end of line, then activating its internal CAN resistor. To enable or disable the resistor, refer to the Mailboxes - Input/Output section of MC110 PDI Builder user manual.

../_images/ResClosed.png

Diagram with CAN resistor activated